Now I knew everything was working, the last job I thought I’d do on the Friday was to install the PinSound board and motion control board, which should have been a 5 minute job.
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Switched it back on and I get nothing. No GI, no solenoids, nothing came on. The mpu wouldn’t boot nor did the PinSound board. I had no clue as to why. I just couldn’t understand why it suddenly wouldn’t power on.
I tried reseating all the connectors but it still wouldn’t turn in. Checked the fuses and tested all the voltages on the driver board and they were good. I started to think it was a faulty PinSound board.
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After a frustrating couple of hours I decided to go back to the beginning and back to basics as usually it’s something simple. I started by un-plugging all the ribbon cables and then only plugging in one at a time. My thinking was that way I could hopefully pin point what part to causing the mpu to not boot up.
In end I finally identified that every time I plugged in the ribbon cable that went from the PinSound board to the DMD controller board the game would no longer boot.
I swapped in another dmd controller from another game to see if that worked and to confirm my suspicion, and it came back to life.
So I added some fresh solder to all the connector pins, plugged the ribbon cable back in and it finally booted again

What was meant to be a couple of hours working on it after work at the end of the week turned into a marathon late night session.
By the time I got it working again it was gone 1.30am and I’d had enough for the night
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