Hi, well try to re-seat ALL of the chips, but I guess start with the 68000, then the ROMs, then the CIA chips, those were most problematic for me with my A500(s) I say the ROMs and then the CIA's, first. If you feel confident enough, have a chip extractor, and take precauctions against static electricity, you may want to remove each chip, one by one and re-insert them. Make sure you put them back in facing the right way. Good luck. I loved the A500, but they could be troublesome beasts, hardware-wise....for me anyway..
