PC fans spin for half a second, PC does not turn on

XxSgtCustardxX

Commendable
May 11, 2016
8
0
1,520
I built my PC about 2 years ago and recently upgraded a few weeks ago with a new case, New motherboard, a new WiFi adapter and soundcard. It was working fine until I went to put in some lights (LED strips) and a few seconds later my PC turned off. I thought I must of blew something so I bought a new 750w PSU, same as my old one, that was not the problem as it still won't turn on. I just literally 10 mins ago replaced my motherboard but it still will not turn on. I have taken everything out including testing the RAM in different slots. I have taken out the WiFi card and also the Soundcard and GPU, then all the other fans spin for half a second then stop (CPU fan and case fans, still no sound or LEDs/ lights) I have done the paperclip test with the PSU, but still no result. It's starting to really annoy me haha, just don't understand what the problem is. I think it would be a good addition to explain how the GPU fans all spin for about half a second and nothing turns on, no lights or anything. I first thought it was not getting enough power but now I'm thinking it is the GPU but still confused as to how that is possible.



Thanks to all in advance! :D
 
Solution
Can you list your full system specs? Have you tried unplugging everything not needed for your PC? I think it could be a dead CPU if you replaced the Motherboard and power supply. It may also be the graphics card. What you should try and do is test your graphics card in another PC if you can.

Another thing you could try is if your motherboard comes with built in VGA display adaptor, take out your GPU and see if you get a signal, if still no signal it's not the GPU at fault.

OliverS

Commendable
Mar 3, 2016
9
0
1,520
Can you list your full system specs? Have you tried unplugging everything not needed for your PC? I think it could be a dead CPU if you replaced the Motherboard and power supply. It may also be the graphics card. What you should try and do is test your graphics card in another PC if you can.

Another thing you could try is if your motherboard comes with built in VGA display adaptor, take out your GPU and see if you get a signal, if still no signal it's not the GPU at fault.
 
Solution