apsistec

I am a bit of an enthusiast, and I think that it has to do with one of the ROM chips, it probably was erased. The ROM had the clear screen in the middle of the form factor so that you could use UV light to erase them and thus re-flash. I could easily be wrong, as I did not read all of your thread; and that is b/c you can go to Pinside Pinball Forum Link There you will definitely get the right answer.