|Hello there, I've seen a few similar questions but I just want to be 100% sure about this.|
How it happened: I was watching video and all of a sudden the screen blinked twice, the video 'shrank' real fast and then the whole PC shut down.
Any changes made recently? - No changes were made to the PC in last one year.
Acer Aspire M 5641
Pentium Core 2 Quad
RAM 3 GB (1GB+2GB)
I've built a pc or two before so I had a fairly decent idea on what's going on. First I checked the power supply. Found it to be a cheap 250W Lite-on PSU. I should've changed it long back! I took out the PSU and shorted the green wire with the black one to simulate Power ON and then checked with a multimeter. There was no output and the psu fan was dead.
So I bought a new PSU, a Cooler Master ModXream 500w. I tested and it works fine. Hooked it up with the PC and tried it - but it was still dead. I took out the motherboard and gave it a thorough clean-up. It was quite dusty, despite my occasional cleaning.
I hooked up the motherboard with the psu and had only the RAM installed. I pressed the On button but nothing happened (the fans also weren't moving also)
I took off the RAM and tried again. No result.
I traced the two pins which are shorted when I press ON button. With multimeter, I checked if the pins are shorted for real and they are.
I replugged the psu and then shorted the two PINs myself using a paperclip to simulate the 'switch on' but still no results :(
I didn't see any burn mark or odd smell.
Checked the cmos battery with my multimeter and it;s alright too.
My back is at the wall now. Any idea how to be sure if the motherboard is gone or the processor?
Appreciate your expert advice on this, thank you so much!!