Quoted from wookiewarlord:
Thanks for the link. Digesting that now.
Let me add a little more detail to the problem in case that helps:
Upon power up the playfield lights flash about every second. On the IO Power Driver Board the L204 light flashes with them, and the Relay switch clicks in time as well. However, on the CPU/Sound Board L200 light is intermittant (except when I hold down the button at SW200. All the other red lights on the boards are steady on. Does that in any way help diagnose the problem?
My TSPP has been pretty reliable, so I’m unfortunately not versed in troubleshooting it. If this were a System 11...
When you say the GI comes on once a second, does it seem like the game is essentially rebooting itself every few seconds? Reason I ask is the only thing I’ve had happen with mine - and is apparently somewhat common - is that it will reset itself. Sometimes just once, but typically over and over.
When this happens, reseating the ribbon cable between the power and main board does the trick.
Sorry I’m not much help, but maybe others will chime in. Also, post to the Tech forum. More likely to get input there.