PC won't boot. No Motherboard Light

Donnie Berry

Reputable
Dec 7, 2014
18
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4,510
SETUP

PSU: Ace Black 120mm Fan 750W
MBoard: Gigabyte GA-970A-DS3P ATX
GPU: XFX HD 7850 Core Edition 1GB GDDR5
Processor: AMD FX-6300
RAM: Corsair 8GB DDR3 1600MHz Vengeance

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I was on my PC playing a game and my pc instantly turned off, upon trying to turn it back on, it stopped after 1 second. The front power button LED flashed once as I turned it on and it end back off, the CPU fan spins 3 times, no GPU fan spinning, The motherboard appears to have no lights appearing either.

We tested the PSU in another PC and it booted fine. There was no burning smell or beeps from the motherboard, thoughts?
 
Yea I thought that, thinking of RMA'ing the Mboard. I am very nooby with pc building, any reason why the cpu fan spins but the GPU doesn't? is it because the motherboard may be faulty and not getting enough power?
 


Then it could be the motherboard's 12v 4/8 pin CPU connector is faulty. Or the 20/24 pin ATX connector is faulty, both of which are required to boot the system. Or it could be your Graphics card misbehaving.

Take your all components out apart from the OS HD, RAM, and Sys fan and see if it powers up.

 


I spoke to him, he seems to think the power socket of the Motherboard is broken, since not all components seem to be getting power (CPU fan spinning, GPU fan isn't) and since the PSU is confirmed working, do you agree that might be the case?
 


Its definitely pointing to a particular not working, my guess would be the mobo's power sockets (CPU and/or Main) rather than anything else. May be time to RMA the mobo. But make sure and check your Graphics card and other components too, as if one of them is to blame it could short out the rest of the board. You don't want a new board doing the same thing.
 


I know the GPU isn't causing the problem as my PC can boot without the GPU, I just have no display, but all the fans/lights run fine. Leaving only the CPU, but there is a very low chance it's the CPU causing it, it may have overheated, although the fact the Motherboard has NO lights showing now whatsoever leads me more towards the motherboard is broken.
 


Wait...... You cannot boot with the GPU in but it boots without?
 


I said that very badly, no I meant usually I can boot without it, in this case no I still can't.
 
Hehehe ok. Yeah most probably one of the power circuits have got fried. Have a close look at the mobo when you get the chance to see if you can spot any tiny markings or indications that something has overheated, it could be a capacitor leaking or resistor burnt out.
 


Thanks for your answer, what are the chances its the board /100 ?