I have a very odd problem with my Solenoid Driver / Voltage Regulator Board. I have replaced this with another board so I know that it is isolated to just this one board. The problem that I have is ..it seems to act up after it warms up. On one pin it locks the MPU up and on the other it locks the sound card and MPU up. It also make a humming sound through the speakers that gets louder as the board gets hotter or is on for a long period of time. The voltages seem to be correct at the test points before and after the lock up. Other than shotgunning this, what component would fail that would cause this problem? BTW this board was rebuilt about 6 months ago using the recommend parts list on PinWiki along with Solenoid Driver Upgrades.