I have a SOYO KT-400 Ultra Platinum Plus (silver colored board) that boots to CMOS but goes no further...never says "OS not found, please insert floppy" (or whatever that message says when no HDD or boot source is present). BUT it DOES say something like "Hardware problem, please see manufacturer". I removed ALL cards, reset CMOS (shorted reset pins and also removed batt. and shorted battery holder terminals), set CMOS (yes it let's me into setup) to basic no fail defaults, changed CPU, memory, known verified VID card (all verified components in another machine with same mobo). Tried with two HDDs, both with perfect installs of XP and BLANK formatted drive.
Very strange. Personally I think the board is bad. Different mobo with same components, same HDD etc. is fine - it's as if the moment it tries to do anything past exiting either CMOS setup menu or just a regular boot without entering CMOS it just craps out. I have 5 Soyo boards all in homebuilt PCs so I pretty much know what I'm doing (does 4 years Sys Admin of a Novell network consisting off over a hundred PCs and 55 Mac's count as experiance, too?). :)
Help! NEVER seen this nor have any colleagues (nor has Soyo...at least the two techs I spoke to).