Fixing an HP dv2000 with No Sound (In Edmonton)

Get all the parts.
Get all the parts.
Clean up the fan and apply silver thermal compound to CPU.
Clean up the fan and apply silver thermal compound to CPU.
Apply silver thermal compound to video chip which is facing upward in this model.
Apply silver thermal compound to video chip which is facing upward in this model.
Replace the faulty hard drive by a used Hitachi 250G hard drive.
Replace the faulty hard drive by a used Hitachi 250G hard drive.
The brunt IC chip
The brunt IC chip
Solder in the new IC chip
Solder in the new IC chip
Circuit diagram showing the IC Chip providing the sound.
Circuit diagram showing the IC Chip providing the sound.
The crack is covered by a sticker.
The crack is covered by a sticker.
Sleek body. Cosmetic is good.
Sleek body. Cosmetic is good.
Front view.
Front view.

I picked up this dv2040ca in May 2010. The cosmetic was good, 9 out of 10. It took me 4 months to get all the parts to refurbish it and restore it to working condition.

Before it was fixed, the right hinge cover was missing, the rear bezel behind the hinge was broken, the power adapter was taped, and the switch board had a crack due to screwing too hard beneath this part. Checking inside, the LCD sensor switch was missing, leaving the wire open. I ran tests indicated that the memory card and hard drive had problems. However, the video was working and the HP Recovery partition in the hard drive was intact. After replacing the faulty memory card, I booted up the dv2000 and got the warning message that the hard drive had S.M.A.R.T. failure. I skipped the warning and pressed F11 to get into the HP recovery. The hard drive was very hot. I needed to put cooling pad beneath it to cool it down to complete the restore and create the HP recovery DVDs.

To fix this poor little laptop, it required a long list of parts below:

  • a LCD sensor switch,
  • a rear bezel,
  • full set of screws,
  • a remote control,
  • a genuine HP power adapter and 2x512 GB RAM.
  • a 250GB hard drive

When all parts arrived, I opened up the laptop, cleaned up the laptop fan and applied silver compound to the CPU. The video chip in this dv2000 was different from my dv2000 before. The video chip was facing up and touching a much bigger metal plate below the keyboard to dissipate heat. This design should avoid the no video or black screen problem. I installed all the parts and booted up the dv2000 from the recovery DVD to restore the dv2000 back to factory image.

During the start up of Windows XP, it didn't give me the Windows XP start up sound from the built-in speaker. I tried the headphone jack which had sound. So, the missing sound was not due to software. I opened up the dv2000 again and inspected the motherboard. I found that an IC chip near to the hard drive was burnt out on the top right corner. Checking the motherboard circuit diagram, the IC coded APA2031 was for sound. I looked up from internet, there were companies selling the IC chip. However, the minimum order was 10 or more. I saved a search on this IC chip and waited for months. I finally could order one IC chip at US$11.8. Using my hot air rework station, I remove the broken IC chip and soldered the new one to the motherboard. I assembled the dv2000 and tested it again. The sound was back.

I used the WiFi connection to install the Windows Update and HP Software Update and tested the DVD, USB, headphone jack and microphone jack. All were working normal, including the switch when LCD was closed. I put in a new battery to the remote control and it worked as well. However, I found that the touch pad missed taps. I resolved by following the instruction from HP website below:

  • Click Start, Control Panel and then double click the Mouse icon.
  • Select the Device Settings tab.
  • Click the Settings button.
  • Click the + sign next to Pointer Motion.
  • Select Palm Check. Move the slider left for 1 mark.

I shared the steps to adjust the touchpad in the last last photo. For the 1 cm crack on the switch board, I put in a sticker to cover it. From what I think, this dv2000 might just had a bad hard drive which burnt the nearby sound IC chip causing no sound. The owner tried to open it but broke the hinges and the switch.

Although it took months for me to fix this dv2000, I was happy that it returned to normal and it was picked by by a user in Edmonton on 30Nov2010 who would take it to field in weekend.




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Comments 19 comments

jack 5 years ago

Hello laptop.shelter,

Thank you very must for a good manual and fotos. I have the same problem with my intel dv2000, I have no sound, but if I disconnect the audio cabel then the sound is back, is that the bad IC chip? maby I need to replace it?

best regards


laptop.shelter profile image

laptop.shelter 5 years ago from Vancouver Author

Hi Jack,

Thank you for your comment. If you are talking about pulling out the headphone jack from the dv2000 headphone port, it is normal because sound will come out from either the built-in speakers or from the headphone port but not both.


Jack 5 years ago

Hi no worries,

If I pull this white flat cable out on the motherboard, then the sound is back on the dv 2000.

Do you think I need to replace the IC chip

http://img24.imageshack.us/img24/3630/fladcable.jp...

regards

Jack


Jack 5 years ago

But then I can not use the headphone port or the remote control on the dv2000.


Jack 5 years ago

Do you think I can use the headphone port and the remote control again if I replace the IC chip.


laptop.shelter profile image

laptop.shelter 5 years ago from Vancouver Author

I understand which cable you are talking about now. In my case, the IC chip was extremely hot. As tester, I suspended it was faulty and replaced it. You may try to touch your IC chip very briefly and quickly to check but avoiding burning your finger. If it is very hot, most likely its circuit has been shorted and you can replace it and try.


jack 5 years ago

No my IC chip is not hot, but maby it is burnt, I think I will try to replace it too, what was the number on your

IC chip ? mine is (K13A G1431)


laptop.shelter profile image

laptop.shelter 5 years ago from Vancouver Author

Mine is APA2031.


jack 5 years ago

ok so maby it is not the same IC chip? i can,t find mine on the Internet


jack 5 years ago

Is your number write on the top on the IC chip


laptop.shelter profile image

laptop.shelter 5 years ago from Vancouver Author

Yes, it is on the top of the IC Chip.


Jack 5 years ago

your Circuit diagram showing the IC Chip on a AMD dv2000 and is work on your Intel dv2000 so is may work on mine dv2000 too

I will give a try

thank you

Jack


laptop.shelter profile image

laptop.shelter 5 years ago from Vancouver Author

Good luck to you!


Jack 5 years ago

Thanks,

I have now find my IC chip on the Internet, the number is GMT G1431.

You had no sound on your dv2000 right, but was there sound in the headphone port ?


laptop.shelter profile image

laptop.shelter 5 years ago from Vancouver Author

Yes, I had sound from the headphone port that I know it was not audio driver issue but hardware problem.


Jack 5 years ago

I have replase a new audio board but the sound only work on the headphone port, so it can only be a bad Stereo Audio Amplifier IC chip.


razan/=iu 5 years ago

laptop.shelter 3 days ago

Good luck to you!

Jack 2 days ago

Thanks,

I have now find my IC chip on the Internet, the number is GMT G1431.

You had no sound on your dv2000 right, but was there sound in the headphone port ?

laptop.shelter 2 days ago

Yes, I had sound from the headphone port that I know it was not audio driver issue but hardware problem.

Jack 2 days ago

I have replase a new audio board but the sound only work on the headphone port, so it can only be a bad Stereo Audio Amplifier IC chip.


Jack 5 years ago

Hello laptop.shelter

Where did you buy your IC chip ?

I can't find any shop.

Kind Regards Jack


laptop.shelter profile image

laptop.shelter 5 years ago from Vancouver Author

It was very difficult to buy one IC chip. I searched a lot of companies in internet. They all have a minimum order of 10 or more IC chips. At the end, I saved a search in eBay and waited over a month that a seller posted it for sale.

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