Thank you again. I uploaded an FCPsyslog_tail.txt file also, but I did a clean restart this AM so it's probably useless. I'll check there next. You may be correct on the Power Supply. I ran memtest86+ twice, and both times it completely hung my machine at the 2 hr, 54 minute point, 23% into the pass. That sounds like possibly CPU, and maybe memory as well. But I think you nailed it as a hardware issue.