I too would suggest that you 'reseat' all the socketed chips and clean their legs with a rubber eraser. (Beware of static electricity and prevent damage to the chips with standard precautions.)
If you can't find a CPU chip in Australia, I can ship one from Nebraska USA. Thankx, Ed eeastmanNO@SPAMapple2.com http://www.applelinc.org Sean McNamara wrote:
switched on. The monochrome screen I got with the machine shows large black and white horizontal bars (about 8) with some gobbledygook-like characters in those bars.