"blinking" power light

[BLEW2]

Very intermittently,my pc's Power light blinks slowly on and off.shortly after, the pc powers off
please note:-
1)using win98se
2)mother board is Asus
3)power up test says power and fans ok
4)windows power-settings are to never power off
my own guess is the processor cooling fan but i'd sooner not proceed without evidence
any ideas ?

 

[BLEW2]

ps reading EVERY word of the manual for Asus mother it says "blinking light on board means standby or sleep mode.it has not yet happened since my re-instal

 

[BadBigBen]

Blew2 - glad you got it fixed... btw my old mobo from MSI did the same thing (W2k and Win98SE) and did this while it was on... clearing the CMOS did the trick for me... that's why I meantioned it in the first place...

cheers,

Ben