PC won't boot. Dead Mobo?

June 11, 2009 at 05:46:43
Specs: Windows Vista
My gf was watching a recorded TV program on our HTPC, when it turned itself off for no apparent reason. I tried to turn it back on, but all I got was the power light, the HDD read light and the DVD read light flashing (plus a pop with every flash from the speakers). It flashes once every second.

After a bit of investigation, I found the mobo light was on solidly and the CPU fan was turning, albeit slowly. I thought it was a power supply problem, so I tried a spare I had. It was a 20-pin psu and the board is a 24-pin board, but didn't think this would matter. Same thing happened.

I removed everything from the board except the power to the board and the power to the CPU and fan, but still the same. I've tested the RAM in another computer and it's fine.

It's an ASUS P5B mobo, with an Intel E6600 cpu.

I'm at a loss. Can anyone help?


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#1
June 11, 2009 at 06:22:55
Are you getting the initial beep at startup?

"It was a 20-pin psu and the board is a 24-pin board, but didn't think this would matter"

It depends on whether you have a PCI-e video card or not. The additional 4-pins feed power to the PCI-e x16 slot.


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#2
June 11, 2009 at 06:55:37
There's no beeping. Just the flashing of the lights.

Would the PCI-e x16 slot need power, if there was no card in it? Or will the motherboard not do anything unless those for pins are there?


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