It's not clear from that page but the AD0-AD15 pics are from the 80C55 itself, and the logic analyser shots are from the ribbon cable to the lcd. I have one m100 that doesn't run that I was poking at several weeks ago. It seems to be in the lcd board. IE, the lcd board atually prevents the rest of the machine from running, not merely that it fails to work as a display. If I connect a good lcd board to the motherboard, it runs. If I connect a good motherboard to the bad lcd, I don't get a beep from blindly entering basic and typing a beep command.
I guess the ramps I'm seeing are smaller, so that's a difference. -- bkw On Tue, May 1, 2018 at 10:50 PM, Brian White <[email protected]> wrote: > I see those same funny ramps and someone here said it was normal. I see > them on both working and non-working M100's > https://photos.app.goo.gl/vcTg4yUhvjXKBxeh1 > > -- bkw
