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

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  1. 70
    cj2600 Says:

    @ Gaius,

    so I’m planning to heat the entire motherboard.

    You can damage the motherboard. I was heating up just the NVIDIA chip, nothing else.

  2. 69
    Gaius Says:

    As soon as I’ll get my hands on a heat gun, I’ll try the same method. But I don’t know exactly what or where the problem is, so I’m planning to heat the entire motherboard. Are there any parts that can’t stand heat at all and should I cover them with foil?

    It’s an Amilo Xa3530 if that makes any difference.

  3. 68
    cj2600 Says:

    @ Thomas,
    My laptop still works but I’m not using it every day. It was a test laptop.
    Some people say this fix might last for a few months maybe even longer.

  4. 67
    Thomas Says:

    I’ve watched this for a while now and am about to try the method. I’d like to know since you said this…..

    “Will it last for a long time? I don’t know. Still testing.”

    How long did it last? I’d like to have an idea of how much time between repairs it would be.

    Thanks for the great guide and all your help!

    Thomas

  5. 66
    cj2600 Says:

    @ smoby,
    It’s hard to tell what’s going on. It’s possible those 2 USB ports got disconnected from the motherboard and have to be resoldered.
    Do you know if 2 not working USB ports located on a separate board? Maybe this board is defective and has to be replaced.
    I cannot help you without looking at the laptop.

  6. 65
    smoby Says:

    pls help me i have 3usb port one is working fine but the other 2 is not when i plug a usb card reader the system wil not read it but when i put it in other one it wil boot up.but the 2 that is not working stil have current in them but not has full as the working one

  7. 64
    cj2600 Says:

    @ vin,

    When I socket the AC Charger into a power supply, the led light indicator on the charger will be on showing that the charger is working properly, but when i try to connect the charger to the laptop, it will give off a small electric spark upon making contact with the laptop charging port, the laptop itself will show no sign of charging, meanwhile the charger will stop working. But when i disconnect the charger from the laptop again, the led indicator on the charger will come on again showing that the charger is working properly.

    It’s hard to tell what is causing the problem but it could be one of the following:
    1. Bad AC adapter. Test your laptop with another AC adapter.
    2. Laptop DC jack is bad or not making good contact with the motherboard. If that’s the case, you’ll have to replace the DC jack. Maybe the jack is bad and shorts the AC adapter.

  8. 63
    vin Says:

    Toshiba Satellite P10-873 charging problem
    My problem is as follows

    When I socket the AC Charger into a power supply, the led light indicator on the charger will be on showing that the charger is working properly, but when i try to connect the charger to the laptop, it will give off a small electric spark upon making contact with the laptop charging port, the laptop itself will show no sign of charging, meanwhile the charger will stop working. But when i disconnect the charger from the laptop again, the led indicator on the charger will come on again showing that the charger is working properly.

    I use the specified charger for the laptop. My laptop model is
    Toshiba satelite P10-873.

    Pls anyone with a step-by-step guide to solve this problem should please help me out urgently.

    thanks.

  9. 62
    cj2600 Says:

    @ marian,

    my hp pavilion dv5-1250 ev have desktop white bat if i connect a old desktop i see very good

    I have a post dedicated to white screen problem: http://www.laptoprepair101.com.....ned-white/
    It’s possible the video cable not making good connection with the LCD screen. Try reseating the cable.

  10. 61
    wat about this.... Says:

    my laptop have the same problem although i have a home made cooling pad but it sims not 2stop the over heating so i opened it just as before but wait a sec i notice some thing the fan stress was not as before when playing game i looked under and saw the gpu on top of d cooling pad….may be this might work wat about if a fan can be fix facing the nvida gpu chip…….

Pages: « 2012 11 10 9 8 [7] 6 5 4 3 21 » Show All

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