We have a tac 50 that the ps1 power supply went out on after a power outage. One of our guys tried replaced it but now when you hook up the +12volt side the cpu won’t come up. There seems to be something dragging down the 12volt supply. Even if we pull all the pmi cards dsp and cpu the supply is still bad and we aren’t reading our -12volts on the test points in the card rack. I’m suspecting a bad card rack anyone replaced these before?
