as documented last time I purchased a replacement solenoid and transistors, I soldered the transistors into the board, wired the solenoid up and tried it out. Nothing worked and now there is a whine, even after pulling out the transistors and solenoid...
After spending quite a bit of time looking at the solenoid board and trying things I found the problem appears to be in the sound board. At least when I pull the sound board everything starts working again.
However..... after soldering the transistors back in again...
More checking, the fuse under the playfield is blown. And it blows every time I connect the replacement solenoid back in.
Time to find out if that was the right transistor.
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