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Sorry, but I will have little time in the next few days working on that Apple ][+ ... :-( I'm afraid I don't get it yet. By taking out one chip after another, the board will not start working again. So I look for changes or note when the board does not display anything at all? How can this be...

Out of curiosity: where on the board do I find those 8304 or 9334 ? On the board revision that I have, I couldn't find anything ...

First of all, thanks for your effort - I know how much fun it is pulling a million of ICs out of sockets for testing ... :) Is there a way to test the 8304 or the 9334 (via oscilloscope or whatever), before I try to order some? And would you try to get those chips from China, or is there a...

Checked all the RAM-Chips with the Chip Tester Pro, and in fact 6 of them (Row E) tested bad. But that was probably because of corrosion, because sanding them als lots of contact cleaner later the all tested good, so I put them back in the board. NOS RAMs are on their way, because I don't have...

Forgot to mention: Reset-Signal on the CPU is fine

Hi all, I'm not quite sure if this is the right place to ask, but I could use some help repairing an Apple ][+ (not an Europlus, but an European Version with 220 VAC). Problem: The Board powers up and fills the screen with more or less random letters, some of which are blinking. I do not get a...