I picked up a Performa 450 off ebay, no video, no sound. First thing I did was recap the motherboard and power supply. There was a little bit of leakage with one cap that I noticed on the motherboard (C20), cleaned that up. Still no joy, started to check voltages on the power supply (Astec 16251), with the power supply disconnected, all voltages look good. When hooked up to the computer, 5 and 12 volts are fine. The -5 is showing up at -2.4. My first thought is the voltage regulator (AN79N05) might be bad. Would that be a good place to start or is there something else I should be looking at to bring this back to life? Thank you.