Flashing power light?

[hayburner]

Anyone have any ideas on what would cause my power light to flash on and off constantly? It happens about every 4-5 days, or if I leave the system on contiuously 3-4 days. To clear it, I have to unplug the power or switch the power supply switch off. System: 1000 mhz T-Bird, ECS K7S5a, (2) 256mg DDR 266mhz ram, Future Power 400w PSU,WD 30GB 7200 HD, USR 56k hardware modem, HP 9100 CDRW, Acer 50x CD-Rom, GeForce Pro 64mg, Diamond 300mx sound, system temp 27C, CPU temp 44C

 

[HonestJhon]

that is what happens when the computer goes into sleep mode, or standby mode.
or is it doing it during normal windows use?
if it is, i dont know what is going on...

-DAvid

-Live, Learn, then build your own computer!-

 

[hayburner]

Everything is still running, it's just when the light starts flsshing, the system becomes unstable and/or locks up