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So I was replacing the heatsink, and now the computer doesn't work!

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Last response: in Motherboards
September 15, 2012 8:52:09 PM

Motherboard: AsusTek P5B-E
Processor: Intel Core 2 Quad
Old heatsink/fan: Intel stock cooler
New heatsink/fan: Cooler Master Hyper 212 Plus

Short story:
Processor jacket on the motherboard looks bent, and computer does not start if I close the jacket on the motherboard or even apply slight pressure on the processor.

Long story:
I picked up a desktop computer from my apartment community's recycling area. The computer flashed some LEDs when I powered it on, but then died. I opened it up, and found the stock intel heatsink had fallen out. I replaced the stock intel heatsink (which was a pain with those pushpins) and the computer started working again, although with idle temperatures of around 60C.

I thought that I got the desktop for free, so why not upgrade the fan a little bit, so my wife can use it. So I ordered Cooler Master Hyper 212 Plus, and installed it today.

However after I did that, the computer stopped working. When I switch it on, the LEDs start blinking for a split second, and then everything dies. I searched online for help, and found suggestions about "Breadboarding". I realized that the computer only flashes some LEDs, the fan turns on for a second, and then it just dies. That was only with the processor in the motherboard (no RAM, no disk drives etc).

I then removed the humongous Hyper 212 plus, and tried turning the computer on, and it died within a second, just as it was happening earlier today morning. I then opened the processor jacket that holds it in place, but let the processor sit in the socket. With the jacket open, I turned the computer on, and it worked for few seconds before I switched it off for the fear of overheating.

I then tried running the computer again, with the processor sitting in the socket, the jacket open, and no heatsink. The fans started running and the LEDs were lit. Then I started closing the jacket with the computer running, and saw something remarkable.

The computer shuts off as soon as I press the jacket lever about 30 degrees. I continued to test this again and again, and realized that the computer shuts off as soon as the jacket applies light pressure on the processor. I pressed the processor lightly with my finger when the computer was running, and the computer always shuts off with a certain bit of pressure on the processor.

I think the Hyper 212 may have damaged the jacket, the processor or the socket while I was trying to screw it in to get a good fix. I have tried to take out the jacket cover and straightening it using a hammer and other tools with some success, however as soon as I close the jacket the computer just dies.

What should I do to make this computer functional again?

More about : replacing heatsink computer work

Best solution

a b V Motherboard
September 15, 2012 9:16:57 PM

Sounds like you bent some pins in the socket, and also the retension mechanism. Looks like you might have to get a new motherboard. Can you post some photos of the damage.
September 15, 2012 9:59:39 PM

Related resources
September 16, 2012 2:46:21 PM

I have tried for almost 24-hours non-stop, bending the pin again and again to check if it works, but no luck so far. I'm giving up now, and buying a replacement motherboard: ASRock 4CORE1600-GLAN Core2 Quad from here: Hope it works.
a b V Motherboard
September 16, 2012 4:06:02 PM

Be very careful on the next install.
September 23, 2012 12:50:04 AM

I have bought a new motherboard and everything works very well again. The bent pin, I could not fix it at all. LGA775 has one of the worst pins in the sockets - they are curved in a very "artistic" way and unless you get that curve again, it's not going to work.
September 23, 2012 12:50:27 AM

Best answer selected by anil_robo.