Sorry for the long post.
I'm having problems with my T2. It's is my only pinball. I've owned it for about 15 years. I had one problem (repairs to cpu board due to battery corrosion) 5 or 6 years ago which was fixed by sending it out for repairs.
I recently moved across state, and when I fired up the pinball at the new house, my sound board fried. Since my finger was still on the switch I turned it back off. No fuses were blown anywhere. After seeing clear damage on the sound board, I removed it. I turned it back on, but it did not turn on all the way, and it resets the circuit breaker in the house about 50% of the time the switch is turned on. I'm not sure if that's caused by the new house I live in, or whatever is wrong with the machine. I measured 122v at the socket.
When it does partially turn on...
The DMD gets a bunch of garbled data on it.
The backbox/playfield do not light up.
Nothing moves or indicates it's on other than the hum of the transformer, DMD garbled data, and LEDs on the circuit boards.
CPU Board LEDS D19 and D21 stay lit. D20 does not light or blink. I'm not sure if it flashes right when it's turned on, I'd have to check again.
Driver Board LED 2 is OFF and the manual says it should be on.
All other LEDS appear correct, even the DMD Board light.
I read that the Varistor might be the problem with the circuit breaker issue, so I took a look inside, and it had no Varistor or Thermistor. I could see where a Varistor had been in place before, but had been cut off. I ordered and installed a Varistor. The machine still resets my house breaker 50% of the time. I did not see where a thermistor had been in place, so I did not install one.
I've tried just booting with just the power plugs to the CPU and Driver boards only (nothing else attached). I just get the same LEDs as above, but cannot see the DMD garbled lights since the DMD board is disconnected.
I thought the CPU board might be to blame since it had failed and been repaired a few years ago. I ordered a Rottendog modern replacement. Installed it, and the LEDs exibit the same behaviour as the original board. I switched back to the old board to verify.
I just pulled the driver board for the first time since I've owned it. Now I didn't see anything obviously damaged, but I did see quite a few spots where repair work was performed by someone named "Zero".
Would a driver board cause the CPU to not boot (D19 should turn off and D20 should flash)?
I don't know what to do next. Since I have the driver board out, I think I'll take pictures. Are there other things I missed, and should check? I've gone over the underside looking for something shorting, or broken during the move. Nothing seems out of place.
Thanks for reading and any help,