Magnavox Computer Monitor 80... what is this? — #6

Post #6 by tomlee59

Source Forum	68kMLA
Category	Troubleshooting
Post Date	Wed, 30 Jul 2008 - 02:07
Original URL	https://68kmla.org/bb/threads/magnavox-computer-monitor-80-what-is-this.14242/

Post

update: apparently it's a green screen monitor, hooked a NES to it, the sound works fine but all games (like super mario bros 3 here) look like this... would be awesome if it weren't bunched up in the middle like it is. the knobs on the back helped get it to that point, but it gets no better. something out of place perhaps? i have basically no knowledge of tubes..

Assuming that you aren't asking it to sync to a vertical sweep rate that is foreign to the monitor, it looks as if there's a problem with the vertical deflection circuitry. It could be something as simple as bad solder joints or oxidized connectors. Can't tell for certain without opening it up and looking around.