When was the last time you changed the cmos battery ? It could be that it's low on charge and upon saving the bios config, the battery caused a glitch.
Hi,   I have a Dell T5500 two Xeon x5660, 72 Gb RAM... Working fine. I have disabled "fast post" in BIOS just to see wich kind of checks it does at post time and now... It does not starts. It shows Dell logo, then I press F2 and appears a message "preparing bios.." and stay in this states. The same if I press F12. If i don't press any key, it remains in the logo screen and does nothing; does not boot. At least after 30 minutes.   As I am not able to enter BIOS, I cannot enable again "fast post" .   Any idea, please?
Post problems Dell T5500