Recently i noticed that all keyboard lights flashes when system is powered on ( prior to motherboard manufacturer screen.)
And when one of the HDD is selected the NUM lock light flashes.
When system reaches some init level all keyboard lights flashes again.(in linux it shows at init screen / in windows xp it is at windows logo )
And prior to shutdown , all keyboard lights flashes again.
Is this the general sequence ? Or is it manufacturer specefic ? Can we detect any motherboard related problems if the lights doesn't flash at all ?