billdeg
Technician
I have not followed every post in this thread, but are you saying that you can't ID the bad RAM? That should not be very difficult. If you set the jumpers to minimum RAM setting and test one page / block at a time you'll gather a good set of RAM. Max the system out with the good RAM you have, even if that's only 16K. At least you can boot into BASIC then. BASIC uses separate RAM from the free/open RAM.
BIll
BIll