computer starts but no sound and no video, fans work

February 18, 2012 at 14:31:22
Specs: Windows 7
installed new CPU same AMD part#, worked fine for a few days, then screen turned blueish green, now I have no video and no sounds when turned on. The fans work and the DVD tries to read when opened and closed, but no display.

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#1
February 18, 2012 at 15:26:59
"installed new CPU same AMD part#"

Why would you install the same CPU? If it had to be replaced, why didn't you upgrade? And what was wrong with the 1st one?

Are you sure the heatsink was reinstalled correctly? Did you clean off all the old paste, then apply a tiny dab of fresh paste to the center of the CPU before locking down the heatsink? Did you check the CPU temp in the BIOS?

What type of graphics do you have - onboard or an actual video card? If it's a card, did you make sure it's fully seated in it's slot?


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#2
February 19, 2012 at 05:10:47
The old one was accidentally damaged when cleaning the fan. The pins got bent, totally my fault, so I replaced it with the same one. No I did not check the temp, did not know to do that, nor did I apply new paste. I am assuming now that these errors probably caused overheating??

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#3
February 19, 2012 at 05:41:30
Sometimes pins can be straightened if minor.
Clean old thermal paste with a quality rubbing alcohol and the help of an old credit card if needed (no metal to leave scratches).
Reapply the thermal paste correctly:
http://www.arcticsilver.com/amd_app...
You never need to remove the heat sink to clean the fan or fins, generally a can of compressed air (Dust Off or similar) will blow the dust out from between all of the fins and off of the blades as well as every other corner of your system.

You have to be a little bit crazy to keep you from going insane.


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#4
February 20, 2012 at 06:53:06
"The old one was accidentally damaged when cleaning the fan. The pins got bent"

Let me guess - you attempted to remove the heatsink & ripped the CPU out of the socket in the process? Next time (if there is a next time), run the system for a bit to heat up the CPU & soften the thermal paste, them shutdown, unplug the power cord & remove the heatsink. With the paste being warm/soft, the heatsink should come off with very little effort. You should NEVER have to yank or pull, just a gentle twist to break the bond is usually all that's necessary. And as Fingers said, if the pins were just bent but not broken off, all you needed to do was straighten them.

"nor did I apply new paste. I am assuming now that these errors probably caused overheating??"

You MUST apply paste & it MUST be done correctly. You can buy "Heat Sink Grease" at Radio Shack for about $3.

http://www.radioshack.com/product/i...

Here's the application instructions:

http://www.arcticsilver.com/PDF/app...


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