I would suspect the problem *may* be disk-related (since few other devices are used so early during reboot). But other BIOS configuration options may also cause it. On most mainboards, a BIOS upgrade entirely clears CMOS configuration.
I would critically look into:
-- Drive geometry settings
-- UDMA and PIO modes
-- Memory and bus timings
-- Which peripherals are enabled
Is it possible to downgrade your BIOS back to the old version? (Note: on some boards, such an operation is considered risky.) If the problem remains after downgrading to the original BIOS (which worked) it must be a CMOS problem (correctable by tweaking parameters).
If the problem goes away after downgrade, it might be a BIOS problem (or at least, related to BIOS-established default values for CMOS parameters).
Last edited by sleeper.service; 12-04-2004 at 08:40 PM.