I recently had very good luck fixing an LCD. With careful inspection with a microscope I found corrosion on the traces that drive the LCD from a particular driver. The corrosion was right under the rubber conducting gasket. I disassembled the LCD, removed the gasket, carefully repaired the traces, reassembled and voila all good.
you could have a similar issue. On Tue, Mar 3, 2020 at 9:58 AM Kevin Becker <[email protected]> wrote: > I've had a Model 102 for years that I enjoy tinkering with and I've often > thought I should pick up a Model 100 as well but never had a real need. > Now with new forthcoming REXCPM on the horizon I figured I might start > watching eBay looking for a deal. I ended up picking up a nice clean (on > the outside anyway) m100 that has some screen issues. There isna large > horizontal band of missing pixels all the way across the screen as well as > some vertical lines missing for about half the screen. > > https://imgur.com/JHnyrUB > > I've seen the repair video linked below fixing similar issues. Squeezing > the bezel fixes part of the widest section of missing vertical lines near > the middle of the screen but leaves every other line missing still. No > amount of pressure anywhere around the bezel seemed to affect the missing > horizontal lines, nor the alternating section of missing lines. My > question is, is there anything else I should check before removing the LCD > bezel and examining the elastomer strips? The NiCad has just begun leaking > but has not reached the board. All but one of the smaller black > electrolytic caps have leaked quite a bit though. Is there any way that > damaged traces on the main PCB would produce the issues on the LCD? > > https://imgur.com/JHnyrUB > https://www.youtube.com/watch?v=bYa-zT75N9s >
