Got my first Rev 0! It's in really nice shape.
When I first powered up, I was getting a solid white screen. If I powered down and back up again, it would sometimes display a screen full of Gs.
I decided on a strategy of removing the entire chipset, and replacing it with a known good from another Apple II and then swapping in chips one by one until something broke. However, still had the same problem on power up. I did find one IC that got rid of the solid white screen on startup. Playing with memory I occasionally got random screens of characters, some of which were changing. Ultimately though, when the remainder of the ICs were returned, I now just get a solid screen full of ? marks. I reseated the memory config blocks, sometimes that would result in things randomly changing, but then back to solid. Reset and CTRL-reset don't do anything.
But yeah.. just ? now. I'm goin
I've checked the RAM, ROMs, CPU etc in the other Apple II. No problem. I'm not seeing any damage to the board, no rust. I'm thinking it might be something still on the board like a transistor.
Anyone run into this before?