Hi!
I have read trough this thread, since I have experienced the same error

- as it seems under the very same conditions as you becks1... I have also done as all replying advisors suggest, but with no success

... I made a second disk fresh OS installation (and switching master and slave hd), and no change was reached... As far as I know of no BIOS settings have been changed lately, but now I have resetted CMOS and I have also updated the BIOS Flash ROM... Still no success, though

... No signs of leaking capacitors that I can see, neither on motheboard nor the power supply...
I may add that this error message sometimes changes to some complaints about not finding the system directory... Some other times the screen turns all black (no text) after it has shown the BIOS settings. Important notice: After some 5-10 cold starts with black screen messages, Windows finally fires up! And once Windows isup, rebooting is no problem. But as I turn off the system power, the next time I try to start the system will not get up...