Check CMOS battery and try replacing it. You could check the battery using a voltmeter( removed from mobo). If you have onboard sound, video for the mobo, use it first if you happen to insert any cards to troubleshoot. A RAM module(s) swapping one or two on power up would be next and make sure its compatible. PSU would be next then CPU or Mobo along the way.
Battery test 3.1v with DVOM.
No expansion cards are installed.
Mboard has onboard audio, video and eithernet.
It has 2 slots for ddr memory modules and 2 slots for sdr modules. I have both types of known good modules and have tried both types, separately (user manual says not to use both types simutaniously.
I dont have another AMD socket 462 CPU handy.