Computer won't turn on, out of ideas

LiquidSwords · Dec 6, 2013

Around Christmas of last year I built a PC that I've been using for gaming, after taking a few hours to assemble it all it worked flawlessly and I never had any problems with it. Two weeks I was playing a game and my computer just up and shut off without warning, afterwards it wouldn't turn back on. I tried to barebone it and got nothing, I tried taking it apart and putting it together again and got nothing, I tried booting it without RAM, and nothing, I tried booting it without the video card and got nothing, I also tried clearing the CMOS to no avail. I assumed that my PSU died so I ordered a new one, replace it and connected everything again and still, nothing. Since the PSU was new I assumed the only logical thing that could be causing the computer to not work would be the motherboard, so I ordered a new one and put it together and still, absolutely nothing. If I press the power button after letting it sit for a while, the power LED will flash and the fan will turn for less than a second and then I get the same nothing as usual. What could be causing this?

Nuno Silva · Dec 6, 2013

For a computer to turn on it needs power supply, motherboard, cpu, memory and graphic card (if has none on-board). However, it is very common that there is a short circuit somewhere and it wont turn on, it is very common actually.
My advice is: take everything out of the case, put the motherboard over something that doesnt conduct electricity and buid the computer back outside the case, cpu, cooler, memory and graphic card, connect the power (both 21 and 8 pin and graphics too if needed). Turn it on by shorting the pwr pins with a screwdriver.
Just dont connect anything extra like the keyboard ... I have seen a mouse with a short circuit preventing a computer to turn on ...
good luck!
If the computer turns on outside the case then there is something else provoking a short circuit.

On the other hand it might not be a short circuit, memory is very tricky to install, you really need to hear and feel both "clicks" when you install those dimms, that might be the problem too

LiquidSwords · Dec 6, 2013

Nuno Silva :

For a computer to turn on it needs power supply, motherboard, cpu, memory and graphic card (if has none on-board). However, it is very common that there is a short circuit somewhere and it wont turn on, it is very common actually.
My advice is: take everything out of the case, put the motherboard over something that doesnt conduct electricity and buid the computer back outside the case, cpu, cooler, memory and graphic card, connect the power (both 21 and 8 pin and graphics too if needed). Turn it on by shorting the pwr pins with a screwdriver.
Just dont connect anything extra like the keyboard ... I have seen a mouse with a short circuit preventing a computer to turn on ...
good luck!
If the computer turns on outside the case then there is something else provoking a short circuit.

On the other hand it might not be a short circuit, memory is very tricky to install, you really need to hear and feel both "clicks" when you install those dimms, that might be the problem too

I've tried building it in a place where it wouldn't conduct electricity without success as well, I'm also positive that I put the memory in right too.

Nuno Silva · Dec 7, 2013

If you are really sure that did everything correctly i'd say motherboard is dead

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Computer won't turn on, out of ideas

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