Recent content by jackson312

It has integer ROMs, I have verified that all of them are good (in a working machine). Yes it is an Apple II (not plus). The problem seems to be in the address lines. A0 and A1 (as probed from the edge connectors) look bad. They are also bad coming out of the H4 and H5 chips.

Is there anyone on here that has experience fixing Apple II boards? I have a board which has a board date 7907, it has integer ROMs. When I turn it on, I get the usual screen full of characters, but no beep or prompt. I have fixed two other machines that had similar issues, but this board has...

I have an Altair 8800 with a bad Display Control Board. I don’t have much in the way of equipment for debugging it (just a multi-meter). I need help figuring out where the problem is. I am looking for someone in the south bay area (I live in Sunnyvale) to help. I can pay, or trade with Vintage...