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I was just rebuilding an old desktop PC to be used as a HTPC and the LED on the motherboard that indicates when there is power is blinking fairly rapidly. The only way I can get the machine to boot is to press the power button immediately after plugging it in, and even then I cannot make it into the BIOS.

The power supply has more than enough juice to power all of the components, and is from a reputable manufacturer.

The motherboard is an Asus and is about 4.5 years old.

Is my power supply hosed? Or is it my motherboard?

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What's the brand/model of the motherboard? – Jared Harley Feb 25 '10 at 3:25
Motherboard is an Asus; updated description. – Corey D Feb 25 '10 at 3:26
Will attempt hooking up my desktop's PSU to it when I get the chance, but it won't be tonight. – Corey D Feb 25 '10 at 3:33
Do any of the fans/disk spin? If not then its most probably is a PSU issue. If the fans/disks do spin then try booting with the bare essentials. Like Mobo + CPU + 1 RAM Stick + (GPU if no onboard available) – IUnknown Jan 24 at 21:56
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Found a URL that might be helpful:

http://www.user-guides.co.uk/download/asus/asusmotherboard/asus-motherboard-led-codes.html

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Kind of looks like a spam site. In any case, nothing useful. Also realized I have another PSU I can try at my parent's so I don't have to tear apart my desktop. Will try it Monday. – Corey D Feb 26 '10 at 15:51
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