This MB seems to be having IDE detection problems. I have the HDD (w/ XP) installed in Primary and it is not being picked up on boot up (have tried it as Master/Single/CS, same results). I have also installed it as Secondary, same result. I have also tried a number of combinations as PRI or SEC with a DVD drive present on the other IDE channel (both always as MASTER/SINGLE/CS). Every so often, it does detect the HDD, and proceeds to load XP normally. I have tried different cables, both 80 and 40 pin. I have tried different memory. I have tried different 12V supplies from same PS. I have also swapped out the HDD with a DVD drive to see if it is the HDD (proven good drive pull from other machine), same results as with HDD, ocassionally does not detect the DVD drive. There is nothing else (video or sound card) installed on this board (all integrated devices).
BIOS is A7255VMS v1.0 dated 8/25/2006.
I have pulled the battery and reset CMOS, same results.
In BIOS: PRI and SEC IDEs are set up for AUTO detect. The HDD or DVD drive are not showing up as being detected. The BIOS has 3rd and 4th IDE, those I've disabled, as well as Floppy and RAID. When the BIOS is not detecting any drives, they do not show up in the BIOS menu, so you can't set the Boot Drive to use.
When it does happen to boot up, it appears to work fine, EXCEPT that if I have the DVD drive installed and try to access it, it may take a few minutes to detect what's in the drive. All point to some kind of IDE issue, to me.
With my limited troubleshooting skills, I have left the following to do:
1. Swap out PS. Existing PS is Thermaltake TR2-430NP. BIOS reports all voltages good.