Here's some feedback for those interested on my HD problem. I appreciate your interest and help. The OS is WIN95 w/ SR2. The MB supports autodetect and is currently supporting a new HD combination of a master (jumper set) and a slave drive, also jumper set, all connected on a fresh IDE cable. This configuration works fine. My testing used the above as a base setup into which I switched the slave units. The old, failed WD is not recognized during boot in Win95, nor when booting from a utility floppy and using FDisk. Feedback to your ideas: 1. I don't have a similar HD to swap boards. The HD is dated 1995. 2. The MB autodetects, so I didn't change CMOS settings by running Setup. 3. Only one IDE cable is used, a new one now. 4. Mentioned by Brooke, the unit temperature may be noteworthy. Fact, the pc would not boot on a Monday morning. Weekends here are sometimes very cool in the office. Therefor, the pc was the coldest, being off for 2 days, when I turned it on and it would not boot then. Right now I heating up the old HD, using the heat from the top on the monitor, and will leave it there all day. In the evening I'll try the hotter drive as I did before. Thanks again, Peter -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu