I'm having trouble getting my computer to boot up. Would appreciate any help. Is my motherboard fried?
The problem:
Computer won't boot, won't go to POST. No beeps.
Power button light does not light up.
PSU fan, CPU fan, case fan all spin.
Hard drives spin up.
Motherboard:
Acer G43T-AM
What happened:
I removed the passive heatsink on top of the north bridge, wiped off the old thermal compound with 70% isopropyl alcohol and a cotton pad, and reapplied new thermal compound (Artic Silver 5) on the north bridge, re-installed passive heatsink.
What I tried:
I've checked all the wires - nothing loose
I tried removing the heatsink and booting without it - no difference
I tried waiting several hours before booting again - still no beep, doesn't power up fully
Resetting CMOS - nothing
Background:
Last summer I bought a Gateway DX4822-01 and everything ran perfectly until this summer when it started overheating. I did all the basics - clean the dust off the fans, re-appled thermal compound to the CPU, added a new case fan - but the damn thing would still shut itself off randomly. I was busy, so I kept the case open and used an external fan to blow at it while running and it run smoothly for hours with no problem. Today I had some free time so I decided to re-investigate the issue and discovered the north bridge running very hot whenever the computer was on. So I decided to clean and re-apply the thermal compound on the north bridge in an attempt to make it run cooler. Everything else was working fine before (as long as the external fan was blowing).