I had a power supply go bad, which also knocked out the keyboard. After replacing the power supply with a new 300W (the old one was 250W) and the keyboard, everything works just fine -- it boots up and runs just like it did before. The only problem is that after I power it down, it will not turn back on by pushing the power button unless I first turn off the power at the power strip, then turn it back on. Any ideas? Could this be a BIOS/CMOS problem? A minor annoyance, but I would like to solve it. Thanks for your help.