1050 Posted October 20, 2017 Share Posted October 20, 2017 Yep, too easy so that's not it. I'm suspicious of the ROM eproms now. The old silicon wasn't all that great back then and large improvements were made since then. Sam's Photofact at atarimania might help you with some scope compares too. http://www.atarimania.com/documents-atari-400-800-xl-xe-technical-documents_3_8.html RESET line not high enough? Any address activity? There has got to be some clue somewhere I would tend to think, best of luck with it. Get back and let us know - the next guy is already pulling his hair out. Quote Link to comment Share on other sites More sharing options...
vputz Posted October 31, 2017 Author Share Posted October 31, 2017 Haha... but in this case, your ROM instinct was right. We got a whole working 800 (underpackaged, in "media mail", with most of the keys blasted off the keyboard, but they went back on just fine) swapped the personality board and it popped right up. Not sure which component on the personality board, but that was evidently the bugger. Always the last place you look. Thanks for the pointer to Sam's! We had compared the scope traces to the pics in the 800 field service manual and they seemed to hold up, but this seems like a good resource; I'll check it out. Although I'm probably going to be tapped for some 8-bit retro entertainment for the evening now that it's back up and running 2 Quote Link to comment Share on other sites More sharing options...
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