PC won't boot, fans and LEDs will turn on

lucaswil

Reputable
Jul 31, 2014
6
0
4,510
Hey all,

So I built a desktop last year, everything was working fine, but then I decided to upgrade the heat sink on the cpu (stock) to a better one (noctua d14) and got it all setup. To make it work I had to unscrew my motherboard to put a backplate on the back of my motherboard. In the process I removed the 24 pin atx, but left in the 8pin atx. When I was done with the head sink and put everything back into place, I forgot to put the 24 pin back in and then pressed the power button. Nothing happened so I turned it off, turned off the surge protector and then removed the cable. When I looked inside I saw that the atx wasn't plugged in and so I put it back in place, closed it back up. This time the fans (plugged into PSU) and the LEDs (plugged into motherboard) came on, but the monitor said no signal and the cpu fans weren't spinning.

I've tried removing and putting back in ram and the video card, but it still won't boot up.

Does the motherboard sound fried and would that be caused by powering up with only the 8 pin atx?
 
Solution
You should have removed all the power from the board including the 8 pin.

Was the computer unplugged from the wall and power button pressed to discharge , before starting install?

lucaswil

Reputable
Jul 31, 2014
6
0
4,510
I'm not sure what you mean by discharge, but when I removed the 24 pin it was off/unplugged and left it off when I closed it up. So the only thing that was plugged in from PSU to motherboard was the 8 pin
 

westom

Distinguished
BANNED
Mar 30, 2009
931
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19,160
We can speculate all day long on what might be. Virtually every part inside the computer is now suspect. To solve this problem, first learn what is. A digital meter, one minute of labor, and requested instructions mean three digit numbers from six wires. Followed by a reply that accuses or exonerates each relevant part.

Otherwise just start replacing good parts until something works. Nobody can say what is or is not defective without some hard facts and those three digit numbers.