shess
Active member
My DE Simpsons had been working fine and I hadn't touched it in a couple months. When I powered it up, I noticed the PIA light was stuck on and it never booted up. I kept trying to power it up and even reseated the connections on the transformer but it never came up. One time after leaving it on for a while to see what would happen I noticed the sound had some distortion in it and then one of the coils heated up to the point of smoking. I disconnected the PPB board to continue testing. I eventually hooked up my multimeter to the +5V and GND tabs on the mainboard and watched as the voltage slowly rise from 2V and when it got to about 4.5V the machine booted up finally. Now that I've booted it up a few times it doesn't seem to have any issues except for that smoked coil.
I'm thinking it's on the power supply, but I'm not sure which parts need to get replaced. The electrolytic caps look recent except for the 18000uf filter cap. Also the 12 pin molex has a burned pin on it. Where should I look at or should I just replace all those standard parts (bridge rectifier, filter cap, molex conn, etc) ?
I'm thinking it's on the power supply, but I'm not sure which parts need to get replaced. The electrolytic caps look recent except for the 18000uf filter cap. Also the 12 pin molex has a burned pin on it. Where should I look at or should I just replace all those standard parts (bridge rectifier, filter cap, molex conn, etc) ?