My Jungle Lord has these random moments where the game locks up during attract mode, when the GI flashes on and off repeatedly during attract. This is only when it's set to no sound during attract mode. (And it's not every time) When sound during attract mode is on, it never seems to lock up. When it locks up, it plays some noise on a loop, which can also be stopped by starting a game. However, the game then has the wrong sounds playing.

The game can also be rebooted by hitting the diagnostic tests. However, for whatever reason it typically factory resets. I've installed NVRAM and replaced all of the sockets. I've yet to rebuild the power supply, sound boards, or the 40 pin connector. (Waiting on the parts)

Alright, still having issues, but no more lockups. Replacing the 40 pin connector stopped it from crashing. However, the sound still occassionally messes up during attract mode. It always starts when the GI lighting flashes. Then it repeatedly plays a sound over and over. Starting a game stops it, but then the game has the wrong sounds, and the only way to fix it is to shut the game off for 10 seconds and then turn it back on.