I recently built an Alpha Clock Five. It was working fine. I brought it to work today, to show it to some of the other geeks. When I got home, I went to plug it in, and it didn't work. There was a small flash (arc?) from the a/c outlet as I plugged in the power supply, but the power supply is working. I measured its output at 9.2V at the jack. I also checked the Reg 5V point on the PCB, and it shows 4.92V, so it's got power, and the regulator is working.
What should I check next?
Thanks for the help,