Static discharge/short in mb (temporary or on-going) BIOS/CMOS EEPROM receives bad signal.
Uncommon, but possible on some systems: nvram/BIOS access from OS altered things. There are viruses that can target data stored in nvram and make some machines unbootable, but that are rather uncommon. Non-power supply related: Someone set a jumper on the mb imporperly. After successive heating and cooling "chip rising" (not so much a problem on modern machines - mostly with older DIP chip based boards with bios in sockets instead of integrated.) Bad contact / intermittant contact with chips used for BIOS Dead battery or battery getting close to being dead (mentioned by you earlier, but still most common.) Failure in chip holding BIOS data Introduction of UV Radiation or open photoport for EPROM and light cause damage/erase (Is any vendor using EPROM for BIOS anymore?) These were off top of my head. I'm sure there are others. Any EE majors/graduates out there? -ME -----BEGIN GEEK CODE BLOCK----- Version: 3.12 GCS/CM$/IT$/LS$/S/O$ !d--(++) !s !a+++(-----) C++$(++++) U++++$(+$) P+$>+++ L+++$(++) E W+++$(+) N+ o K w+$>++>+++ O-@ M+$ V-$>- !PS !PE Y+ !PGP t@-(++) 5+@ X@ R- tv- b++ DI+++ D+ G--@ e+>++>++++ h(++)>+ r*>? z? ------END GEEK CODE BLOCK------ decode: http://www.ebb.org/ungeek/ about: http://www.geekcode.com/geek.html Systems Department Operating Systems Analyst for the SSU Library On Tue, 23 Apr 2002, Ryan wrote: > Anything other then a dead battery that'll cause a CMOS checksum error > after the computers been off AC for a little while? _______________________________________________ vox-tech mailing list [EMAIL PROTECTED] http://lists.lugod.org/mailman/listinfo/vox-tech