posted on Jan, 2 2009 @ 10:29 AM
Thinking about it several things occur to me.
One, it is perfectly normal for hardware failures to work now and next reboot not. (yeah, i know that sucks)
The whine,screech is what has my attention.
Are you knowledgeable/ brave enough to remove the side of the case? ( no, seriously)
if so, do it.
then with your head in the case, hit the power button and try to see where the screech comes from.
I suspect it is from the cpu fan.
If that is the case, it "MAY" have allowed the cpu to overheat and fail.
"IF" that happened, it may have damage the motherboard and what's on it. (like the bios).