Recent content by MLMorris

Hello: I have dug out my T2000 which I bought new back in '83 or 84. It is a dualFDD model which has 640K ram, the High-Res graphics and the Mouse/clock card. As far as IO recall, it all worked fine when I put it away. The machine powers up fine and displays the Memory Size on the...

An update for those interested: I fixed the "swoop" depicted in the photo above. I did so a little bit by accident. I did something dumb which fried the outputs in two ICs on the TRS-80 Model I motherboard. After replacing them, the display problem was corrected. The ICs replaced were the...

Dave: Thanks for the help and I agree with your thiniking. I replaced the power Caps in the keyboard unit which improved the 60Hz ripple but didn't fix the "swoop". Into the display next, ... although I think I killed something in the keyboard unit video out circuit while poking around. I'm...

Vertically the image is VERY stable. Horizontally It does wobble a bit which looks to me like a 60hz related ripple. I plan to replace the power supply caps in the keyboard unit this evening. I'm pretty sure they are one of the problems. I'm not so sure about the way the text swoops across...

Good question. I once had FDD but they're long gone. It is sitting on an Expansion unit which is currently disconnected and not energized. No obvious sources of mag field in present location. The display has been in storage for a long time. I wonder what it was sitting near. The...

Hello After reading a little on this forum I decided to dig out my old TRS-80 Model 1 to see if it stll works. As you'll see in the photo, it boots and runs BASIC code. However the display is distorted. The vertical is very stable and I can adjust it as you would expect using the various...