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PC Shut Off - Won't Post

J

jcleary47

n00b
Joined
May 27, 2014
Messages
5
I was using my PC fine - left the room - came back and it was off.

Tried turning it on, and the fans spin up, motherboard lights turn on, but no display on monitors.

I've tried another PSU, moved some RAM sticks around - hard to take out the GPU's because of my water-cooling setup (I have two in SLI).

This PC had been working fine for a few weeks.

I suspect it is the motherboard and here is why:

I connected a fan hub to the CPU_Header for PWM control. I connected the fan hub to the power supply with a SATA power cable for power. Huge mistake here, but the SATA power cable came disconnected while the PC was on, and I believe the CPU_Header was left trying to power about 8 fans by itself.

Could something like this kill the motherboard? Overloading one of the fan headers?
 
jcleary47 said:
I was using my PC fine - left the room - came back and it was off.

Tried turning it on, and the fans spin up, motherboard lights turn on, but no display on monitors.

I've tried another PSU, moved some RAM sticks around - hard to take out the GPU's because of my water-cooling setup (I have two in SLI).

This PC had been working fine for a few weeks.

I suspect it is the motherboard and here is why:

I connected a fan hub to the CPU_Header for PWM control. I connected the fan hub to the power supply with a SATA power cable for power. Huge mistake here, but the SATA power cable came disconnected while the PC was on, and I believe the CPU_Header was left trying to power about 8 fans by itself.

Could something like this kill the motherboard? Overloading one of the fan headers?
Click to expand...

It's possible that an overload took out the motherboard. I learned a long time ago not to split fan headers for this very reason. Usually the fan header is the only thing that gets fried but it's possible for something like this might happen.
 
Dan_D said:
It's possible that an overload took out the motherboard. I learned a long time ago not to split fan headers for this very reason. Usually the fan header is the only thing that gets fried but it's possible for something like this might happen.
Click to expand...

Yeah, that's my concern. It looked like the fan hub was still lit up when the PSU cable came disconnected from it, which is why I think the CPU Header was trying to power it still, and it had 8 fans running on it.

Unfortunately it's hard for me to test other parts because of my water cooling loop, but I'll have to take it apart to replace the motherboard anyway so I guess I'll try my GPU's in m backup PC just to rule those out, but I'm guessing it's just the motherboard.
 
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