proliant ML 150 g3 rare problem

[Ivan N Quaglia]

hello, first time in this forum, i had this heavy (literally) babe, and a rare problem occurs, works full week up as a tatabase, and the weekend stays turned on for remote usage, but it seem to turn off in some moment, and reboot, but doesn't boot up then, the fans stay on "take off" mode (full speed) but it does nothing, no POST o what so ever.
first time it happened just turned off wait and restart, but no go.
then opened unplugged anything, take out the memory disconnect all, cleaned all (lots of dust) put all back togheter and tuned on, it worked.

this time happened the same, but after a day turned off, it works again.

it has Windows 2000 server updated as far as it can be.
two sata in raid 0.
just like got suspended or something like, but is not configured to suspend or hibernate.
(maybe the PSU is the problem but i dont know if a regular PSU will work, i had no replacement now)
thanks in advance

[Ivan N Quaglia]

ok, waiting some answers i have made some changes into the bios, rebooted and it hangs with no post, fans start to regulate at low speed, i had to reboot. im starting to think in the bios version as the problem, actual is from 2006. where i can get the latest BIOS?