No shorts found under playfield

Maybe my lamps are playing up cause after doing a factory reset it seems more lamps are coming on when they shouldn't in the single lamp test!! !@

Driver board swap maybe?

Unless anyone else has some ideas I would swap the driver board. At least that would clear it from having a fault so you can concentrate on other things with out having that in the back of your head. If the fault is changing then I doubt it is the driver board though.

If you have cleared the field wiring and the driver board could it be the CPU? You could try reseating the chips in the CPU board including the ASIC. I think but you should confirm that the CPUs are also interchangeable as long as the jumpers near the eprom are the same if you change the eprom over.

I would consider leaving your Indy eprom in and installing the indy CPU in the CFTBL and again only plug in the lamp matrix and other essential power plugs. You cant hurt solenoids and things if their not plugged in.