In this post I explain how you can fix a motherboard with failed NVIDIA graphics chip. This repair might apply to some HP/Compaq laptops and probably some other brands. If this repair works for you, please mention the brand and model number in comments after the post. This will help other readers.

This method should work for the following models: HP Pavilion dv2000, Pavilion dv6000, Pavilion dv9000, Compaq Presario v3000, Presario v6000, HP Pavilion tx1000, Pavilion tx2000.

By the way, I just fixed my son’s Xbox 360 with red ring of death (error 74) using exactly same technique.

MOST COMMON PROBLEM SYMPTOMS

1. Laptop turns on with garbled video on the internal screen and external monitor.
2. Laptop turns on but there is no video on the screen or external monitor.

MY UNDERSTANDING OF THE PROBLEM

The graphics chip soldered to the motherboard. When the laptop runs hot for a long time, the graphics chip separates from the motherboard and video fails.

HOW TO FIX FAILED CHIP

Before I tried baking the motherboard in an oven or use bubble-wrap. But today I’m going to fix it using a heat gun.

Basically, I’m going to heat up the graphics chip with a heat gun to solder it back to the motherboard (reflow). I think this method is more reliable and the repair should last for a while.

WARNING!

There is no guaranty this method works all the time. While doing this repair you may damage the motherboard and make it unrepairable.
Proceed at your own risk and don’t blame me if after this repair you’ll get a very expensive door stop. :)
If you don’t feel comfortable doing this repair, take your laptop to the repair shop.

HOW I FIXED THE MOTHERBOARD

First of all, you’ll have to disassemble the laptop and remove the motherboard.

In my example I’m using a motherboard removed from HP Pavilion tx2000.

In most laptops the graphics chip located under the CPU heatsink (and it has NVIDIA logo on it), so there shouldn’t be a problem locating the chip.

I’ll be using an Ecoheat heat gun EC-100.

In order to figure out how to position the heat gun and for how long, I tested it on a penny with a small piece of solder on the top.

The heat gun has a switch on the handle. There are two positions for the switch. Position 1 – slow. Position 2 – fast.
I used position 1 – slow.
I positioned the heat gun about 1 inch away from the penny and turned it on.

After about 40-45 second the solder started melting. After 50 seconds the solder melted completely.

To protect the motherboard from the heat I used a regular cooking aluminum foil. I cut off a piece of aluminum foil and folded it a few times to make my protection shield thicker. After that I cut off a square opening right in the middle, same size as the NVIDIA chip.

If there is thermal grease on the chip it has to be removed. You can remove thermal grease using alcohol swabs.

It’s not necessary to make it perfectly clean. Just make sure there are no large chunks of the grease on the chip.

UPDATE: Some people mentioned that I should have applied some liquid flux underneath the chip for better results. I’ll definitely do it next time when I have to fix another motherboard.

I found this video explaining how to apply liquid flux under the chip. This video was made for Xbox 360 motherboard but should apply to any laptop motherboard too.

Finally, I positioned the heat gun above the NVIDIA chip about 1 inch away and turned the heat gun into the position 1.

After 50 seconds I turned it off and let the motherboard cool down for about 20 minutes.

Don’t forget to apply new thermal grease on the graphics chip when you install the heat sink.
Some laptops use thermal pads instead of grease. If that’s the case with your laptop, make sure the thermal pad positioned correctly.

After I assembled the laptop back together, the video started properly!
The NVIDIA graphics chip problem fixed!
Will it last for a long time? I don’t know. Still testing.

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200 Comments

Pages: « 2017 16 15 14 13 [12] 11 10 9 8 71 » Show All

  1. 120
    cj2600 Says:

    @ alexlee,

    my acer aspire 4551 fan stop working after 5 second!please help!black screen!

    I don’t know if this is true for your Acer Aspire 4551 laptop but on some laptops the cooling fan works only for a few seconds on startup and later it turns on when the CPU gets hot.
    No video? Have you tried removing memory modules one by one? This could be memory related failure.

  2. 119
    dave Says:

    hi
    the zif touchpad connector came off the board on a hp tx1000 it took 2 of the tracks with it. would you know where the 4 connections terminate on the board to enable me to fit another zip socket and wire onto the motherboard

    thanks

  3. 118
    David Says:

    Looks like you pulled the CPU too. I imagine as a precaution considering its proximity to your heat gun.

  4. 117
    alexlee Says:

    my acer aspire 4551 fan stop working after 5 second!please help!black screen!

    amd

  5. 116
    cj2600 Says:

    @ mike,

    my pavillio DV9000 don’t want to turn on?

    More details please.
    Does it show any activity at all? Any light? Any image on the screen?

  6. 115
    mike Says:

    my pavillio DV9000 don’t want to turn on?

  7. 114
    Jim1976 Says:

    Thanks for all great info it helped me sort out my Sony Vaio’s VGN-NR31J/S GPU.Although i would suggest to everyone to try and download a repair manual from manufacturer and use your guide as well and include the following(at least basic tools) for the job:

    1.Anti-Static ESD wristband
    2.Liquid flux
    3.Heatgun (any whith a concentrated nozzle will do)
    4.Heat Paste (preferably silver compound – i used arctic silver 5)

    My machine works a treat after a day at GPU 69 celcius max testing it on max battery with rally game. A reduction of 8 degrees in total and no crashes.

    Will let you know if or any hickups as i go along.

    Cheers

    Jim

  8. 113
    cj2600 Says:

    @ Mohammed Ali,

    I’ll love to be receiving tips or is any forum which I can join because your tips has helped me a lot.
    I’ll really appreciate it if you guys will help me with this favour..

    You can subsribe to my twitter account at: http://twitter.com/laptopfixed

  9. 112
    cj2600 Says:

    @ Stephen Piper,

    HP-6735b update… The laptop I fixed with a heat gun failed after about a month. Its startup was intermittent until one day it failed as before with startup lights. I have just re-done (heater) the GPU and applied some pressure after 55 seconds to see if I could force the chip back on. It is now working again and will update again when it fails!

    Did you use any flux the first time?

  10. 111
    Mohammed Ali Says:

    I’ll love to be receiving tips or is any forum which I can join because your tips has helped me a lot.
    I’ll really appreciate it if you guys will help me with this favour..

Pages: « 2017 16 15 14 13 [12] 11 10 9 8 71 » Show All

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