That is an interesting approach. I've taken several PC-3 pocket computers apart and reassembled them which is my only experience with elastomeric strips. I've been successful in that regard on the smaller PC-3 scale. I have to admit, I'm not eager to disassemble the LCD on this M100 so I may give that a try first. On a side note, I ordered replacement electrolytic caps, a new NiMh battery, and an 8kb RAM module to bring it up to 32kb so I hope I actually can get the screen working to make it all worthwhile.
On Tue, 2020-03-03 at 19:40 -0800, B4 Me100 wrote: > I have not had any success removing the LCD bezel so would not > recommend that approach. It was hard for me to get the elastomer > strip to re-conform on the PCB making things worse in the end. I > tried it on two different LCDs so perhaps I need more practice :) > One trick that works for me is to put some de-oxit (or similar) on > the elastomer and the use a thin piece of plastic or card to very > gently massage the elastomer via the gap between the bezel and PCB. > The screen can be powered to make it easier to see which lines are > being impacted. Looking at the image I would say it looks like > oxidation issues. Driver issues usually result in faint lines that > vary in intensity with the contrast. At least in my experience. > From: M100 <[email protected]> on behalf of Kevin > Becker <[email protected]> > Reply-To: <[email protected]> > Date: Tuesday, March 3, 2020 at 6:58 AM > To: "[email protected]" <[email protected]> > Subject: [M100] LCD Lines > > > > > blockquote.cite { margin-left: 5px; margin-right: 0px; padding- > > left: 10px; padding-right:0px; border-left: 1px solid #cccccc } > > blockquote.cite2 {margin-left: 5px; margin-right: 0px; padding- > > left: 10px; padding-right:0px; border-left: 1px solid #cccccc; > > margin-top: 3px; padding-top: 0px; } > > a img { border: 0px; } > > li[style='text-align: center;'], li[style='text-align: right;'] > > { list-style-position: inside;} > > body { font-family: Segoe UI; font-size: 12pt; } > > 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
