trs-80 model II trouble

Hi It could still be a single RAM failing. If it is a stuck output line, it could over ride the others output. RAM failure is still the most likely. Swapping the RAMs for the high and low nibbles would tell which it is. If they are socketed, they should be able to be removed by carefully prying them up with a small screw driver. I do this by doing a little bit on each end. If you have two screw drivers it is a little faster. Of course, they do have special tools and I think I even have one, someplace in one of my tool boxes or drawers. Just don't pry the socket off the board or you'll need a soldering iron as well. Dwight _________________________________________________________________ Your E-mail and More On-the-Go. Get Windows Live Hotmail Free. http://clk.atdmt.com/GBL/go/171222985/direct/01/