How to Disassemble HP Pavilion Dv4 __ Inside My Laptop

8/10/2019 How to Disassemble HP Pavilion Dv4 __ Inside My Laptop

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How to disassemble HP Pavilion dv4

In this guide I explain how to disassemble a HP Pavilion dv4 laptop. Ill be removing the display panel and top cover

assembly.

Before you start, make sure the computer is turned off and battery removed.

STEP 1.

Remove the hard drive, memory and CMOS battery covers from the bottom.

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w to disassemble HP Pavilion dv4 >> Inside my laptop http://www.insidemylaptop.com/disassemble-hp-pavilion-dv4-laptop/

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On the following picture you can see all covers removed.

Now you can get access to both memory modules, hard drive, wireless card and CMOS battery.

I believe HP Pavilion dv4 can handle up to 8GB RAM maximum. It means you can install up to 4GB memory module

into each memory slot.

This model uses DDR2 PC2-6400 SODIMM memory modules.

For the purpose of my guide its not necessary to remove memory modules. Ill leave them connected.

STEP 2.

Remove three screws securing the hard drive.

Slide the hard drive assemble to the left in order to disconnect it from the motherboard.


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Now you can remove the hard drive.

If you are replacing it, youll have to transfer mounting brackets to the new drive.

HP Pavilion dv4 uses a regular 2.5 SATA HDD.

STEP 3.

Disconnect both antenna cables from the wireless card.

For the purpose of my guide its not necessary to remove the wireless card, so Ill leave it connected to the motherboard.


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STEP 4.

Unlock the DVD drive and pull it out.

STEP 5.

Disconnect and remove the CMOS battery.


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In the following 7 steps I explain how to disconnect and remove the keyboard. Its not necessary go though all previoussteps (except removing CMOS battery cover) in order to remove the keyboard.

STEP 6.

Remove three screws securing keyboard on the bottom.

STEP 6.

Carefully lift up the top part of the keyboard with a sharp object. Continue removing keyboard with your fingers.

WARNING!Its possible the keyboard is glued to the top cover with double sticky tape. Remove it slowly.


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STEP 7.

Lift up the keyboard and slide it towards the LCD screen so you can access the cable underneath.

STEP 8.

Before you can remove the keyboard its necessary to unlock the connector.


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STEP 9.

On the following picture the cable connector shown in the locked position.

In order to unlock the connector youll have to move the brown clip about 2 millimeters towards the display.

Be careful, the brown clip must stay attached to the white base. Dont move it more that 2 millimeters.

On the next picture the connector shown in the unlocked state.

Now you can pull the cable from the connector.


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STEP 10.

Finally, remove the keyboard.

STEP 11.

Remove seven screws securing the bezel. Dont forget two screws in the DVD drive bay.


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STEP 12.

Disconnect LED board cable from the motherboard.

Remove two screws securing the bezel to the top cover.

STEP 13.

In order to remove the bezel, slide it towards the display and lift up.


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STEP 14.

Disconnect the power button board cable from the motherboard.

Remove one screw securing the board.

Remove the power button board.

STEP 15.

Disconnect the speaker cable.

Disconnect the lid switch cable.

Remove three screws securing the speaker assembly.


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STEP 16.

Lift up and remove speaker assembly.

STEP 17.

Disconnect the video cable.

Pull wireless card antenna cables through the hole in the top cover. We disconnected both antenna cables from the

wireless card in the step 3.


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STEP 18.

Remove four screws securing display assembly hinges.

STEP 19.

Lift up and separate the display panel assembly from the base.

If you would like to replace the LCD screen, you can follow this screen removal guidefor HP Pavilion dv4.

By the way, its not necessary to separate the display panel from the base in order to remove the screen.


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STEP 20.

Remove six remaining screws from the bottom.

STEP 21.

Remove four screws securing the top cover.

Disconnect the touch pad cable (yellow arrow).

If you have finger scanner installed, disconnect it too (green arrow).


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STEP 22.

Its not necessary, but you can disconnect the USB cable.

It will be easier to remove the top cover when this cable removed.

STEP 23.

Carefully lift up and separate the top cover assembly from the base.


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STEP 24.

Remove the top cover assembly.

On the following picture you can see the laptop base with the top cover removed.

Im not going to remove the motherboard but you can find instructions in the official HP service manual (available from

HP website).

If you would like to clean the cooling fan and heatsink (to fix overheating) just used canned air and blow air into the fan

until all dust is gone.


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By the way, in HP Pavilion dv4 laptop the DC jack is not soldered to the motherboard.

If the jack is damaged, you can replace it with a new one without soldering. Simply unplug the damaged the jack harness

and replace it with a new one.

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90 Comments


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1

CharithaSays:

January 10th, 2011 at 11:15 pm

Thanx a lot !!!!

2

FMMSays:

January 21st, 2011 at 10:53 am

I have a problem that the DVD would not eject using the latch only as described. Is there a screw that needs to be

removed somewhere? Otherwise, my compliments on the great instructions.

3

IML TechSays:

January 23rd, 2011 at 10:42 pm

FMM,

Is there a screw that needs to be removed somewhere?

I dont think so. Slide the latch and wiggle the optical drive a little bit to remove it from the laptop.There shouldnt be any screw securing the drive.

4

patriciaSays:

January 28th, 2011 at 9:41 am

can u please help me i have a hp pavillion dv6753cl and i was having problem with plug and i taped the wires and

somehow the tape came off and the 2 wires touched and sparked so i fixed cord and the light from ac adapter comes

on but not the power button i want to know if i fried the mother board , i took it to radio shack and there plug works

but the power button doesnt turn it on

5Joe PeachSays:

January 31st, 2011 at 2:16 pm

I want to thank you for the incredible, helpful site you put together!

I dropped you some change via PayPal.

It seems only right for how you helped.

There are other helpful sites, but I know when I come to you,

it will be a painless disassembly, unless of course I read to fast

Thank You again!

Joe Peach

6

IML TechSays:

February 1st, 2011 at 8:45 am

Joe Peach,

I want to thank you for the incredible, helpful site you put together!

I dropped you some change via PayPal.

It seems only right for how you helped.

Thank you for your donation. Im glad you found this guide useful.

7

JamesSays:

February 17th, 2011 at 1:47 am


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i got my escape key coming out of my keyboard.. tell me how to fix it again ?

i hav hp dv 4 laptop

8

VikramSays:

February 23rd, 2011 at 9:04 pm

This website is awesome!

I own a HP Pavilion dv4t-1200 CTO notebook. My problem is that the screen display has started shaking. Also I

can see fine lines near the bottom edge and top edge of my lcd display. The display however is nice and bright.

Also, while connecting it using an HDMI cable to an external display, it has no shake and the display is perfect. Is

this a loose connection problem?

I opened my laptop and reconnected the main video cable to the motherboard, thinking it may have come loose.

But the problem is still there.

I did nould this be due to loose cot check the inverter connections. Connections of the cables with the inverter?

9

IML TechSays:February 23rd, 2011 at 9:16 pm

Vikram,

I own a HP Pavilion dv4t-1200 CTO notebook. My problem is that the screen display has started

shaking. Also I can see fine lines near the bottom edge and top edge of my lcd display. The display

however is nice and bright. Also, while connecting it using an HDMI cable to an external display, it

has no shake and the display is perfect. Is this a loose connection problem?

I opened my laptop and reconnected the main video cable to the motherboard, thinking it may have

come loose. But the problem is still there.

Its possible you have bad video cable or failing LCD screen. I would try replacing the cable first. If it doesnt help,

move to the LCD screen.

I did nould this be due to loose cot check the inverter connections. Connections of the cables with the

inverter?

No, its not related to the inverter.

When you have a problem with the inverter board, the screen backlight goes off.

10

kalakalSays:

February 27th, 2011 at 11:18 am

got problem with my pc.,., sometimes it open.,., the power light apeears but the screen is never sometimes?? what

is it what will i do

11

carlosfsmSays:

March 6th, 2011 at 9:01 am

Hi. Do I have to go through all these steps to clean the fan and heat sink? I think I do.

To assemble back, Im guessing Ill just read the guide again from bottom to top, right?

Also, will the system run normally after reassembly? Or will it ask me to go through some setup config first?

Thanks! Great guide!

12

IML TechSays:


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March 10th, 2011 at 11:39 pm

carlosfsm,

Do I have to go through all these steps to clean the fan and heat sink? I think I do.

Try cleaning it with compressed air. This doesnt require laptop disassembly at all. Just blow air into the fan grill on

the bottom until all dust is gone.

To assemble back, Im guessing Ill just read the guide again from bottom to top, right?

Thats right.

Also, will the system run normally after reassembly? Or will it ask me to go through some setup configfirst?

If you assemble everything correctly, it should start right away. No setup/configuration needed.

13

MichaelSays:

March 18th, 2011 at 2:34 pm

I have an HP G61-511WP with a broken screen. I dont see anything on this website on how to remove the LCD

screen for this particular model. Could anybody help please?

14IML TechSays:


Michael,

I have an HP G61-511WP with a broken screen. I dont see anything on this website on how to remove

the LCD screen for this particular model. Could anybody help please?

I dont have instructions for this particular model but I think it should be similar to one of the following guides:

http://www.insidemylaptop.com/replace-broken-lcd-screen-hp-pavilion-dv3-laptop/

or

http://www.insidemylaptop.com/remove-lcd-screen-from-hp-pavilion-dv5-laptop/

15

oneluv06Says:



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Hi I have a hp dv4 1145go and i cant see anything on my screen, its on i can put contrast up n down and see it get

lighter and darker. i hooked it up to an external monitor and the computer works great. what do you think the

problem might be . ittok it to bb and they said it would cost 389.00 and i cant do that any help Thanks

16

IML TechSays:

March 27th, 2011 at 10:49 am

Michael,

I have an HP G61-511WP with a broken screen. I dont see anything on this website on how to remove

the LCD screen for this particular model. Could anybody help please?

I just took some pictures for replacing broken screen on a HP G62 notebook, it could be similar to your HP G61.

Ill compile a new disassembly guide soon.

17

IML TechSays:

March 27th, 2011 at 10:51 am

oneluv06,

I have a hp dv4 1145go and i cant see anything on my screen, its on i can put contrast up n down and

see it get lighter and darker. i hooked it up to an external monitor and the computer works great. what

do you think the problem might be .

Its hard to tell what is wrong. Could be one of the following:

1. Bad connection between the video cable and motherboard. Try reconnecting the cable.

2. Defective video cable. Try replacing the cable.

3. Failed LCD screen. Try replacing the screen.

18

GladysSays:


Hi,

I think that my computer has an issue with the DC jack. Before i take the entire computer apart is there any way to

test it?

If

My battery says it needs to be replaced but I feel the computer should work with out the battery when it is plugged

in to an electrical outlet. I remove the battery from the computer shouldnt it still work with electrical power?

Thanks, Gladys

19

LukeSays:


website was extremely helpful in disassembling my laptop. My computer was not getting power but it worked

when the battery is charged. I replaced the dc jack, however, the laptop is still not getting power. Any idea what the

problem can be?

20

IML TechSays:

March 31st, 2011 at 7:32 am

Luke,

My computer was not getting power but it worked when the battery is charged. I replaced the dc jack,

however, the laptop is still not getting power. Any idea what the problem can be?


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Its possible you have a problem with the AC adapter. Maybe the AC adapter doesnt work correctly when loaded

(laptop turned on). Ive seen failures like that a few times before. Youll have to find another working AC adapter

to test the laptop.

If the problem still exists even after replacing the adapter, most likely this is motherboard failure.

21

yashresthaSays:

April 7th, 2011 at 1:23 am

hey, i use a pavilion dv4 1502tu, my display cable is damaged. is there any way i can get it fixed? when i connect

my laptop to the external display everything else works fine. and if i have to replace it. can u suggest me where can

i get the replacement part?

22

SudipSays:

April 8th, 2011 at 3:44 pm

hello my dv4t laptop keeps showing me a white screen whenever i turn it on.

could it be the video card? video cable?

When i try to run it using an external monitor.. the monitor comes up black as if though its not getting any signal

thanks!

23

IML TechSays:


Sudip,

hello my dv4t laptop keeps showing me a white screen whenever i turn it on.

could it be the video card? video cable?

Could be bad connection between the video cable and LCD screen. Try reconnecting the cable.

When i try to run it using an external monitor.. the monitor comes up black as if though its not getting

any signal

Its possible the laptop doesnt start with external monitor because the internal monitor still connected to the

motherboard.

You can try disconnecting the video cable from the motherboard and try starting the laptop with the external

monitor. Can you get external image when internal screen disconnected from the motherboard?

24

IML TechSays:


yashrestha,

hey, i use a pavilion dv4 1502tu, my display cable is damaged. is there any way i can get it fixed?

when i connect my laptop to the external display everything else works fine. and if i have to replace it.

can u suggest me where can i get the replacement part?

Yes, its possible to replace the video cable but youll have to disassemble the display panel.

You can follow this guide for HP Pavilion dv5 laptop which should be very similar.

http://www.insidemylaptop.com/remove-lcd-screen-from-hp-pavilion-dv5-laptop/

You can search for a new cable using display cable part number listed in the service manual:

http://h10032.www1.hp.com/ctg/Manual/c01597750.pdf

The display cable part number mentioned on the page 27.

It says: LCD cable for Flush Glass display assemblies 486878-001

25


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ThySays:


Hello and thank you for the very detailed instructions.

Will you be showing instructions for removing the motherboard from the base. Ive tried to use both your

instructions for HP Pavilion DV5 and the service manual for DV4 (page 107-109) and removed the DC Jack cable,

audio cable, 2 slotted screws in the expansion port, one screw in the bottom right corner of the motherboard plus

another screw but it still seems pretty securely attached and didnt want to break anything, pulling more than it

seems to want to give. Also couldnt find the modem module cable to disconnect. I want to change the broken

battery latch and its just behind the motherboard.

Also, you mentioned in your response to a post above that problems with inverter board would result in the screen

backlight not working. Does that mean that there will be no image or a dim image? Im sorry if thats a stupid

question but this is my first time taking apart a computer. My screen comes on but either comes up pink/red or

green depending on the angle that the screen is tilted. Im guessing that its a bad video display cable and should

replace that? I have not tested it with an external monitor as Im not quite sure how thats done. Would I just plug

the monitor into the HDMI port? I have already taken apart the computer and put it back together again and

checked to make sure the cable connections are all secure but the screen still goes pink or green.

Thank you for your assistance and I hope I was clear enough.

26

ThySays:

April 17th, 2011 at 12:14 pm

Sorry, I just found the modem module cable. It was wrapped under the modem module and I used the service

manual (page 99-100) to remove module in order to access the cable itself.

And looking around the internet, realize that I wont use the HDMI port but the VGA port to connect to external

monitor?

Thank you.

27

IML TechSays:

April 19th, 2011 at 10:36 pm

Thy,

Also, you mentioned in your response to a post above that problems with inverter board would result

in the screen backlight not working. Does that mean that there will be no image or a dim image?

When inverter fails, you still should see a very dim image on the screen.

My screen comes on but either comes up pink/red or green depending on the angle that the screen is

tilted.

Most likely its one of the following:

1. Bad connection between the video cable and motherobard. Try reconnecting the cable.

2. If it doesnt help, this could be defective video cable. Try replacing the cable.

3. If the problem still there, most likely this is LCD screen failure. Try replacing the screen.

I have not tested it with an external monitor as Im not quite sure how thats done. Would I just plug

the monitor into the HDMI port?

Yes, you can do that. Either HDMI port or VGA port. It depends on which port and cable you have.

I have already taken apart the computer and put it back together again and checked to make sure the

cable connections are all secure but the screen still goes pink or green.

Feels like bad cable to me.


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28

BrandonSays:


Hello, I took it apart to fix the power jack. Now I have all these different type of screws. Which ones goes where?

29

RobertSays:

May 1st, 2011 at 12:17 pm

I have a dv4-1225dx, everything comes on, i can hear windows start up, I use avast antivirus and i can hear it

update, I can also use the keyboard to shut the laptop down. My problem is, I have no display, the LCD seems to

have the back light on, but nothing else. I have tried to hook up the laptop to my flat screen tv through the VGA

connector,but no display there either, havent tried the HDMI output as I have no cable. It has a ATI Radion HD

3200 video card and I am assuming it is not replaceable. Any ideas as what I can do to fix it?

30

HankSays:

May 20th, 2011 at 7:29 am

Robert,

I have the same problem with my dv4-2160us and mine would also not connect to my flat screen tv through either a

VGA or an HDMI cable. I am currently having success hooking it up to a standard LCD computer monitor via

VGA so that I can recover my files. I will keep you posted on my progress. If anyone has had this problem or has

any suggestions, PLEASE SHARE!

31

IML TechSays:

May 20th, 2011 at 2:04 pm

Hank,

I have the same problem with my dv4-2160us and mine would also not connect to my flat screen tvthrough either a VGA or an HDMI cable. I am currently having success hooking it up to a standard

LCD computer monitor via VGA so that I can recover my files.

Its possible you have to choose the right channel on your TV in order to get the image.

32

gaurav singhSays:

May 22nd, 2011 at 11:30 am

hello,

i have a dv4 1241 and have gone through all of your steps regarding cleaning the heat sink but in the meanwhile

during assembling back i missed connecting the lid switch as in step 15 and i think it has been removed from the

other end and fixed on motherboard , so please let me know if the cable is damaged or the position where it was

initially attached (other then motherboard end)..

33

PranavSays:

June 4th, 2011 at 10:05 am

I disassembled my dv4-1241 tx, i mounted it back, but misplaced some of the screws here and there. i also cleaned,

fan, heatsink, CPU and GPU. I reapplied thermal paste on CPU and GPU. CPU is working very fine. It hardly

crosses 65C while gaming. But my GPU is working weird. When i boot the laptop, GPU temp is 75C. While

gaming it crosses 100C. Please somebody helpThanks in advance

34

john WilburSays:


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June 4th, 2011 at 10:29 am

This is an excellent instruction tutorial on tearing down the laptop. I have a dv4 that has been running so hot, it has

occasionally stopped, even with a fan cooler. I tried cleaning, no good. Finally I decided to bite the bullet and tear it

down. This made it easy. Although I have built many a desktop, Ive never torn down a lap top. Actually getting the

mobo out was still pretty hard. something was caught around the video port. Probably the flexible metal bracket. I

cleaned and regreased the cpu, and when I blasted some canned air on the fan (now readily accessible), it tossed out

a couple of big chunks of dust bunnies that felt like, well, felt.

When I put it together the first time it didnt work! Graphics processor error. Tore it down. taped the looseconnector tightly in place (come on HP!). Voila, it works, and with crossed fingers, I hope it keeps on keepin on.

Thanks again for the great tutorial.

35

IML TechSays:

June 5th, 2011 at 8:25 am

@ Pranav,

But my GPU is working weird. When i boot the laptop, GPU temp is 75C. While gaming it crosses

100C.

Not sure whats going on but let me guess.

When you removed the heat sink, do you remember if you had thermal pad covering the GPU?

Did you remove the thermal pad and applied thermal paste on the GPU instead? If you did, thats why the GPU

overheats.

If you have thermal pad before, you have to use thermal pad again.

36

SenorLeungSays:

June 19th, 2011 at 11:41 am

Quick question. For HP dv4t-1000 series, do they all share the same keyboard? So if I buy a keyboard from ebayfor the 1100 series, would it work for the 1300 series?

37

EverettSays:

July 4th, 2011 at 12:13 pm

Re: John Wilbur, loose graphics card connector

Hello! I disassembled my dv4 also to clean out fan (with this awesome guide) but upon putting it back together i

am getting a non-start up due to the graphics card (four blinking lights).

I was wondering what connector you had to tape down when you had this problem and where to find it? Hopefully

my comp i not dead

thanks.

38

Omeng TinggiSays:

July 7th, 2011 at 12:55 am

thank you very much for this tutorial,

I follow many instructuction before I succes disassemble my hp pavilion dv3.

39

earthSays:

July 12th, 2011 at 12:19 pm

hi! i just had trouble in taking out the bios battery. did you push it towards the main battery slot? or did you just

pull it up? i tried both to no avail. thanks


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40

DanielSays:

July 19th, 2011 at 8:47 pm

Thank you so much for making this guide. It really helped me to properly tear down my laptop so that I could clean

the dust from 3 years of use.

I should have reassembled in the same order as disassembly because I messed up by routing the USB cable below

the grey plastic, causing my battery to fail to sit properly and for the battery ejector to be stuck.. I noticed it after I

had already completed reassembly, of course, so I had to go back and fix it, wasting about 45 minutes. So be sure to

test all moving parts before reassembly.

However, thanks to your guide, Im finally up and running, with new thermal paste and dust-free! Thanks

41

Melvin AndersonSays:

August 15th, 2011 at 1:28 pm

Great documentation!!

I do have one problem with the assembly. I cant find where the two wires coming from the display panel attach. I

have followed them from the display panel down through the hole, but cant find where they connect.

Please Help me!!

Thanks,

Mel Anderson

42

Melvin AndersonSays:

August 16th, 2011 at 5:57 am

In relation to not finding the place for the two wires coming from the display panel, I found it in step 3. The oldsaying, If all else fails, read the manual certainly applies!!

Thanks very much,

Mel

43

Denver Computer RepairSays:


I love this site for articles such as this one! Great tutorial for those that fix laptops and also useful for anyone who

is just curious. With as many HP DV4 screen issues I have seen, this article is a really good quick visual reference.Thank you for creating it!!

44

Santanu beraSays:

October 29th, 2011 at 6:50 pm

Thats a outstanding,really i want to give thanks to the owner of this website.from this i can assemble some specific

laptops myself.thanks again sir

45

IML TechSays:

November 16th, 2011 at 12:10 pm

Thanks guys,

I hope this disassembly guide is useful and helpful for all DIYers.


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46

GarySays:

February 3rd, 2012 at 3:03 am

Wow, you saved my life. Was desperate to do it. Thanks a lot

47

MoSays:


Hi

Can someone please tell me exactly where the card reader cable is located on the HP pavilion DV4? I am trying to

disconnect the card reader cable itself and not from the MB and I am having trouble finding out where its located.

Thank You

48

MelissaSays:

May 16th, 2012 at 9:49 am

Great details with great photos! Thanks so much. Im hoping I can fix my webcam problem and get the fan really

clean, so I can sell this laptop to help pay for my new one. =)

49

SamSays:

June 2nd, 2012 at 6:36 am

Hello thank you.

Im a computer idiot and yet by following your clear and detailed instructions, I managed to bring my laptop back

to life again TWICE. The first time happened a year ago with fan problem and the second time was bad connection

between the video cable and LCD screen that I fixed yesterday.

Thanks again.

50

Mike S.Says:

June 19th, 2012 at 7:16 am

Excellent tutorial! I needed to disassemble my wifes laptop because she spilled iced tea on the touchpad and the

touchpad started acting up. After removing and rinsing the touchpad with water and drying it everything is working

properly.

I followed the directions exactly except for step #20. For my laptop (DV4-1283cl) I had to remove a seventh screw

inside the hard drive bay to get the top cover assembly off. It is a black screw located on the left side inside the

drive bay. Probably just a variation in the models.

Id like to give a big THANK YOU to the author.

51

steely74Says:

June 20th, 2012 at 3:36 pm

can you tell me what the lid switch cable connects to? not the zif end on the mobo but the other end. I just did a fan

replacement job and it appeared to not connect to anything! now the customers volume buttons etc dont work. I

see they sell just that cable piece so its repairable but I couldnt find any info on how to connect it on the non zif

end.

52

steely74Says:

June 27th, 2012 at 6:53 am

disregard my last post! different cable.


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53

wolf3345usSays:

July 21st, 2012 at 1:47 pm

Hi and Thank you for you great breakdown. I took apart my DV4 thinking I had a bad DC jack on the side but

when I applied a multimedia to the other end of the power cable that connects direct to the motherboard I got 19

volts. It seems the motherboard is getting power but still not turning on. I tried the electrostatic dissipation trick but

still nothing(hold down the power button for 1 minute without a battery or charger plugged in. I think its probably

a bad motherboard but Im not sure. Is there anything else I might have missed?

54

IML TechSays:

July 23rd, 2012 at 10:56 am

@ wolf3345us,

I think its probably a bad motherboard but Im not sure. Is there anything else I might have missed?

Its not turning on at all? Could be the power button board failure (shown in the step 14).

If the laptop turns on but there is no video, could be memory failure.

Its not very clear from your description how the laptop is failing.

55

JohnSays:

July 26th, 2012 at 7:56 am

Hi Thanks for the detailed description to open it. Here is a problem. I have HP dv4-1225 dx with Windows 8 OS.

Recently i had a problem that while switching on, the system switches on but i dont see any video, rather seeing

capslock and numlock LEDs blink, continously. If i leave it on for a while, sometimes the whole system switches

on. Considering the problem with Win8 OS, i tried with Linux, but the system didnt boot up. I have no clue. But for

a long time, the system was warning me about the internal battery replacement. so can it be the major cause for the

present problem. I couldnt think anything else, since, while it switches on occasionally everything works well,seems my hard drive, mother board and other things are working. I would be happy to provide more info if you

need. Thanks a lot for your help.

56

IML TechSays:

July 27th, 2012 at 2:57 pm

@ John,

Here is a problem. I have HP dv4-1225 dx with Windows 8 OS. Recently i had a problem that while

switching on, the system switches on but i dont see any video, rather seeing capslock and numlock

LEDs blink, continously. If i leave it on for a while, sometimes the whole system switches on.

Check the memory modules. Try reseating them. Test the laptop with only one module installed. This could be

memory related failure.

57

DiegoSays:

August 1st, 2012 at 12:53 am

HI Mr. Great Guy , heres my probs , i have the same model as this Laptop youved shown to dis assyble method .

Now heres the error codes numlock & capslocks blinks every 4 seconds , somebody told me and give me error

codes for this matter . now where is video chip controller is located to this motherboard so that i can resolder it by

me self. HP Service Center Saudi Arabia dont have a clue for this or never touch if it is this case. ill try to crossmy finger even though to try to make this crap alive again . Tnx.

58

IML TechSays:


f 33 01-09-2014 16:31


28/33

August 1st, 2012 at 5:39 pm

@ Diego,

i have the same model as this Laptop youved shown to dis assyble method . Now heres the error codes

numlock & capslocks blinks every 4 seconds

First of all, remove the hard drive and try removing memory modules one by one. Will it start with only one

memory module installed?

59

SarahSays:

November 18th, 2012 at 10:40 am

Is there a place where I can buy the replacement clips that you lock the ribbon cables in place with? My brother lost

one of the clips

60

Cliff KreloveSays:

November 27th, 2012 at 5:28 pm

Thanks for the pics helpful in correctly and easily disassembly. I am going to impose on you and ask a question. Ireplaced the top (the diplay panel) in my dv4 1014nr but I may have made an error. The display fits and works

great, but I lost the controls at the top (the touch volume, media player, and wifi on/off switches) and the battery is

no longer detectable. Does it seem like I missed some reconnections somewhere?

I would appreciate any information you could give me, if you have time.

61

andreloSays:

December 2nd, 2012 at 8:15 am

Hi, thanks for great breakdown. I have a dv4 that does not connect to power, Ive already tested my AC adapter and

is working. When I connect the laptop on power not even the DC jack led turn on, the only thing that happens is the

front power led starts to blink if the batery is in it, but without the batery I get nothing.

62

mikeSays:

December 10th, 2012 at 11:22 am

My Pavilion dv4 turns on boot will not boot. My number lock and caps lock blink at the same time, every 2

seconds? Is there a trouble shooting code chart that can help my figure this out.

Thanks!

63

IML TechSays:

December 15th, 2012 at 9:41 am

@ Mike,

My Pavilion dv4 turns on boot will not boot. My number lock and caps lock blink at the same time,

every 2 seconds? Is there a trouble shooting code chart that can help my figure this out.

First, I would check laptop memory. Try removing memory modules one by one and test the laptop with each

module separately. If one of them failed, the laptop should start properly when you remove the failed module.

64

RaineSays:


i have a HP Pavilion DX4 2145DX. I think i have a missing module. May i ask what module that isconnected

beside the remote compartment.(internal module).


f 33 01-09-2014 16:31


29/33

65

chiranjitSays:


I recently upgraded my dv4 to windows 8. but after installing I am facing a lot of heating problem. I never faced it

when Win7 was installed. any suggestion?

66

KevinSays:


Help!!!! I need help asap please..

my problem is common I guess..Thought it was battery problem because battery warning replacement shown

couple months back and finally gave out.so bought new battery and adapter..tried every suggestions.no

cigars.So..heres the problem:

Blank screen, fan on, caps and nums lock blink every 3 seconds.

I was told to remove the ram and insert back in maybe and motherboard may be the problem.

Do you know anything about it?

Thank you if you have the time

67SekharSays:

January 27th, 2013 at 9:48 pm

I am facing a lot of heating problem. and last few days its showing battery need to replace any suggestion?

68

McctinkSays:

February 5th, 2013 at 1:10 pm

The brown clip that you talked about when removing the keyboard, broke. For the life of me I cant find a

replacement clip. Any ideas? HP is no help!

69

DaveSays:

February 22nd, 2013 at 1:46 pm

Great photos. How would i replace the SATA connector, i think i bent a pin when i removed the HD? Is there a

quick way or do i need to basically remove everything. Looks like maybe screws on top side holding it down?

thanks in advance

70

Ben TellezSays:

February 27th, 2013 at 4:04 pm

How do I unlock the DVD Drive? I have the laptop disassembled to that point. Since there is no power, pushing the

button on the DVD door does not pop open the DVD.

Thanks

71

KatieSays:


Followed you procedure, any Ideas on what to do if the following keys; tab `56ty-=[], have stopped working

afterwards. Should I just buy a new keyboard? or did I miss a plug somewhere? Everything else works as it should.

Thanks for your help

72

IML TechSays:


f 33 01-09-2014 16:31


30/33

April 22nd, 2013 at 9:07 pm

@ Katie,

Followed you procedure, any Ideas on what to do if the following keys; tab `56ty-=[], have stopped

working afterwards. Should I just buy a new keyboard? or did I miss a plug somewhere? Everything

else works as it should.

Try reconnecting the keyboard cable. Maybe the connection is bad. Make sure there is no dirt stuck in the

connector.

73

MichaelSays:

May 31st, 2013 at 1:26 pm

My hard drive SATA connector is cracked. Is there a way to fix it without replacing the motherboard and without

soldering?

Thanks for the help!

74

MesheraSays:June 11th, 2013 at 6:23 pm

Thank you so much for publishing this information. Ive never touched the inside of a computer before. Im not

technically inclined, but Im willing to try anything (with instructions). I was successfully able to replace the video

ribbon cable on my HP Pavillion laptop following the steps on this site. You saved me about $300!

75

M3r^jSays:

June 17th, 2013 at 7:19 am

where is the connector for sim card? Where to get those cable and how to connect?

76

Allen WardleSays:

July 26th, 2013 at 2:55 pm

Can I remove laptop screen part for good and just use external monitor?

77

IML TechSays:

July 30th, 2013 at 5:26 pm

@ Allen Wardle,

Can I remove laptop screen part for good and just use external monitor?

Yeah, that should work but

Dont forget that wireless card antenna cables running INSIDE the display panel. If you remove the display, the

internal wireless will not work. Youll have to use LAN port or external USB wireless card.

78

AnaSays:


How would I be able to replace the display panel cover? Would I have to go through all of the steps to remove the

display panel? And what would I do after that?

79

IML TechSays:

August 8th, 2013 at 1:00 pm


f 33 01-09-2014 16:31


31/33

@ Ana,

How would I be able to replace the display panel cover? Would I have to go through all of the steps to

remove the display panel? And what would I do after that?

Are you asking about the display back cover?

Yes, youll have to go though steps 1-19 to separate the display from the laptop base.

After that follow this display disassembly guide.

Once you remove the LCD screen and inverter board, you should be able to replace the display back cover.

80

Lanny WeintraubSays:

August 21st, 2013 at 5:20 am

To replace the flex connecting cable to the screen is it necessary to disassemble the entire computer with the steps

show above or can the cable replacement e accomplished with less

steps?

81

ZachSays:

August 22nd, 2013 at 4:52 am

When disconnecting the lid switch from the motherboard, the other end of the lid switch was also disconnected and

I cannot find where it goes. Please help!

82

IML TechSays:

August 23rd, 2013 at 1:07 pm

@ Zach,

When disconnecting the lid switch from the motherboard, the other end of the lid switch was also

disconnected and I cannot find where it goes. Please help!

What cable you are talking about? In which disassembly step?

83

IML TechSays:

August 23rd, 2013 at 1:24 pm

@ Lanny Weintraub,

To replace the flex connecting cable to the screen is it necessary to disassemble the entire computer

with the steps show above or can the cable replacement e accomplished with less

steps?

Youll have to go though STEPS 1-14 in order to access the LCD cable connection on the motherboard.

Also, youll have to disassembly the display panel as it shown in this guide.

After that you should be able to remove and replace the cable.

84

Otavio GuerdSays:


ol, sou do Brasil, mesmo no entendo muito o ingls sigo este excelente site.

Aqui tem muitos HP dx4, e com muito problema tcnico, e seu post est me ajudando muito.

Obrigado! SUCESSO!

hello, Im from Brazil, even I do not understand much English follow this excellent site.

Here has many HP dx4, and very technical problem, and your post is helping me a lot.

Thank you! SUCCESS!


f 33 01-09-2014 16:31


32/33

85

MikeSays:


I have had video problem the first with DV4 2045dx no boot blank screen,this is a common problem with DV

series Bad solder on video chipsets.I replaced MB (350.00) new from Hp,DONT DO THIS ! it went BAD in 6

Months with the same problem.Next I bought a used MB(2140dx) on EBAY(100.00) DONT DO THIS ETHER! It

went bad in 2 months.If you search the net youll find all DV and many other Hp model laptops with same problem

CAUSED by ROSH standards for lead solder. I repaired mine by buying a video chipset without the balls (BGA)found some old lead solder balls reballed about 200 on a squire inch !!! and solder it back to M board this is the

only fix that will last you can send out to have reflowed WONT last,, LEAD FREE SOLDER will be causing

problems so if you dont know how to do this repair,THROW the laptop out. BUY A MAC!! That is how i solved

the problem of my DV series BUT I still have one that the color changes from REG. to white area becomes PINK,if

someone has a fix lets talk..Thank you

86

ChrisSays:


Working on my HP dv4-2145dx following above guide to step 6, but cannot get keyboard to release, removed 3

screws and prying up keyboard but it is firmly afixed between the f12 and scroll keys and between f4 and f5. Seemsmore than just sticky tape. Noticed 3 small holes with keyboard icons in the battery compartment, pushing with

blunt tip through these holes the top of the keyboard raises but will not release. Anyone have suggestions for

getting keyboard up without over stressing? Ultimate goal is to fix black screen. Works with external monitor.

Thanks for any advise.

87

ChrisSays:


Got the keyboard up! Small black tabs at gaps between function keys. Needed extra pull at those spots.

88AbhishekSays:

May 10th, 2014 at 5:09 pm

Hey, I really Need Your Help. My laptop Freezes so Often and its temperature rising to 80 celsius then again

freezes. Im not able to use my Laptop now and its not in warranty period. I think issue is with heatsink or CPU

fan.

Can you please show me how to clean CPU FAN.

My laptop is HP DV4 2106TX .

89IML TechSays:

May 10th, 2014 at 5:40 pm

@ Abhishek,

Find an air compressor, canned air or at least a vacuum that can blow air.

Turn the laptop upside down and youll see the fan grill on the bottom.

Blow air into the fan grill until all dust is gone. After that switch direction and blow air into the grill on the back

side of the laptop.

This should be enough to clean up the fan.

NOTE: when you cleaning the fan, block it with a needle so it doesnt spin like crazy. Very high RPM can damage

the fan bearing.

90

CksSays:

June 14th, 2014 at 5:29 am


f 33 01-09-2014 16:31


33/33

If you google the dv4 models, there is a chipset problem. Because of the laptop running so hot, it causes the chipset

to have a bad connection with solder contacts. Only fix is to have the chipset reflowed which you will find tutorials

on how you can do it yourself on youtube. But from others experience after doing a reflow, the problem will return

within months or even weeks. Time for a apple which never runs into these problems. Good luck.

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