Hi, I'm hoping someone can point me in the right direction on a maddening problem I'm having on my SWE1 machine. The game will run normally for several hours at a time but eventually the CPU seems to become disconnected from the power driver board. I will discover the game displaying the "Coin door is open" message but none of the playfield lights are working but the screen and the computer still seems to be working, and sometimes it will appear to be stuck in a game. I checked the LEDs when it's like this and I have noticed the blinking "health" LED will be out during these events. Rebooting the machine will get it working again for another couple of hours but it always seems to end up back in this state.

Things I have tried up to this point. I have a new power supply in the computer cage. I also pulled the motherboard and made sure it was not shorting out against the computer cage box (a suggestion from the PB2K Wiki site) but neither made any improvement. The power driver board was swapped into this machine from my HUO RFM which I did to get the STE1 neon working, so the power driver board is relatively low use as compared to the game itself (which is a high use route game). For the record the power driver board never had any issues in it's old home in my RFM.

I'm open to any suggestions of what to try next. This problem seems to occur whether the game is being played, or is just left running in attract mode.

TIA for any suggestions!

I saw that mentioned on one of the repair forums. But just to be clear, the computer itself never seems to lock up, it happily keeps running away (either going through it's attract mode, or if it is somehow is in a game it will continue to run the monitor and the sound during one of these events). It just seems to lose connectivity with the power driver board.