27/10/12 How to disassemble HP Pavilion dv4 laptop >> Inside my laptop

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How to disassemble HP Pavilion dv4 laptop

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

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

STEP 1.

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

Home

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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 memoryslot.

This laptop uses DDR2 PC2-6400 SODIMM memory modules.

For the purpose of my guide it’s not necessary to remove memory modules. I’ll 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 the hard drive, you’ll have to transfer mounting brackets to the new drive.

HP Pavilion dv4 laptop uses a regular 2.5″ SATA hard drive. Any large SATA hard drive should work fine in this laptop.

STEP 3.

Disconnect both antenna cables from the wireless card.

For the purpose of my guide it’s not necessary to remove the wireless card, so I’ll leave it connected to the motherboard.

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STEP 4.

Unlock the DVD drive and pull it from the laptop.

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. It’s not necessary go though all previous steps (except

removing CMOS battery cover) in order to remove the keyboard.

STEP 6.

Remove three screws securing keyboard on the bottom of the laptop.

STEP 6.

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

WARNING! It’s 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 it’s 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 you’ll have to move the brown clip about 2 millimeters towards the display.

Be careful, the brown clip must stay attached to the white base. Don’t move it more that 2 millimeters.

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

Now you can pull keyboard cable from the connector.

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STEP 10.

Finally, remove the keyboard.

New keyboards for HP Pavilion dv4 laptops available here.

STEP 11.

Remove seven screws securing keyboard bezel. Don’t 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 keyboard 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 power button board.

STEP 15.

Disconnect speaker cable from the motherboard.

Disconnect lid switch cable from the motherboard.

Remove three screws securing the speaker assembly.

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STEP 16.

Lift up and remove speaker assembly.

STEP 17.

Disconnect video cable connector from the motherboard.

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 laptop base.

If you would like to disassemble the display panel and remove the LCD screen, you can follow this LCD screen removal guide for HPPavilion dv4 laptop.

By the way, it’s not necessary to separate the display panel from the laptop base in order to remove the screen.

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STEP 20.

Remove six remaining screws from the bottom of the laptop.

STEP 21.

Remove four screws securing the top cover.

Disconnect touch pad cable from the motherboard (yellow arrow).

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

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STEP 22.

It’s 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 laptop base.

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STEP 24.

Remove top cover assembly.

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

I’m 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), you can do it without removing the motherboard. 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 DC jack harness and replace itwith a new DC jack harness which is available here.

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61 Responses to “How to disassemble HP Pavilion dv4 laptop”

Pages: [7] 6 5 4 3 2 1 » Show All

61

Laptop Tech Says: August 1st, 2012 at 5:39 pm

@ Diego,

i have the same model as this Laptop youve’d 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 moduleinstalled?

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.

Take a look at this guide: http://www.laptoprepair101.com/laptop/2011/02/23/fix-laptop-motherboard-with-failed-nvidia-graphics-chip/

60

Diego Says: August 1st, 2012 at 12:53 am

HI Mr. Great Guy , heres my probs , i have the same model as this Laptop youve’d shown to dis assyble method . Now heresthe 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. i’ll try to cross my finger even though to try to make this crap alive again .

Tnx.

59

Laptop Tech Says: 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.

58

John Says: 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

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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.

57

Laptop Tech Says: July 23rd, 2012 at 10:56 am

@ wolf3345us,

I think it’s probably a bad motherboard but I’m not sure. Is there anything else I might have missed?

It’s 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.

It’s not very clear from your description how the laptop is failing.

56

wolf3345us Says: 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 it’s probably a bad motherboard but I’m not sure. Is there anything else I

might have missed?

55

steely74 Says: June 27th, 2012 at 6:53 am

disregard my last post! different cable.

54steely74 Says: 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 don’t work. I see they sell just that cable

piece so it’s repairable but I couldn’t find any info on how to connect it on the non zif end.

53

Mike S. Says: June 19th, 2012 at 7:16 am

Excellent tutorial! I needed to disassemble my wife’s 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.

I’d like to give a big THANK YOU to the author.

52

Sam Says: June 2nd, 2012 at 6:36 am

Hello thank you.

I’m 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 cableand LCD screen that I fixed yesterday.

Thanks again.

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