Hmmm, the only thing to try is increasing the pressure slightly to force more movement in the elastomer. Also make sure the plastic is moving the elastomer.
Did the other rows blink out and back on as you move along the elastomer strip? From: M100 <[email protected]> on behalf of me <[email protected]> Reply-To: <[email protected]> Date: Saturday, April 11, 2020 at 6:44 PM To: <[email protected]> Subject: Re: [M100] Missing ROM elements > > > > Okay. I sacrificed some plastic packaging and slid it in there with some > cleaner. no joy. I spent probably 25-30 minutes doing it. i'm going to let it > sit for a while and try it again. I have a honeydo list in the meantime. > > > Your explanations were very straight forward and I appreciate it. > > > It doing this doesn't fix my problem, do you have any other suggestions? I did > some mild twisting of the pcb and didn't notice any difference. > > > Meanwhile I have a 200 incoming that I look forward in using. It may suit my > targeted needs more so than the 100. I have plans for the 100 though, once i > can see the entire screen. > > > On 4/11/20 8:06 AM, B4 Me100 wrote: > > >> >> That worked :) >> >> >> >> >> The contacts run top and bottom of the screen there are none on the side of >> the screen. If you have the TRS-80 Model 100 Reference Manual page 75 has a >> picture of the top of the circuit board showing the contacts (link: >> http://www.classiccmp.org/cini/pdf/Tandy/Model%20100%20Tech%20Reference.pdf >> <https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.classic >> cmp.org%2Fcini%2Fpdf%2FTandy%2FModel%2520100%2520Tech%2520Reference.pdf&data= >> 02%7C01%7C%7C9a4683990cf5454f131708d7de832530%7C84df9e7fe9f640afb435aaaaaaaaa >> aaa%7C1%7C0%7C637222527150781330&sdata=Yu75VKucOg0r2yt3D1rcDiYVfknv5yZHUIEFwO >> e7iqk%3D&reserved=0> ) - they are tiny gold fingers on the board. The >> elastomer has bundles of vertical conductors buried in it that take the >> signal from the board to the bottom of the LCD glass panel and the >> transparent traces that run on the screen glass panels you can just see >> them in the video. There is also schematic for the screen in the reference >> manual showing how it is arranged and pg 34 provides some more details on >> the arrangement. Because the units are so old the elastomer has started to >> harden which means it no longer presses onto the board as well as it once >> did. It may also depend how the unit has been stored during its lifetime. >> >> >> >> >> The oxidation generally occurs at the PCB to elastomer contact and a little >> gentle movement can sometimes clean it out and make a good contact once >> again. The de-oxit just helps with the process. It may take a few attempts >> to clean it so take your time and make sure nothing shorts out on the bottom >> of the board to anything else if you choose to perform the repair powered. >> >> >> >> >> The card has to be thin enough to fit between the metal of the screen >> surround and the PCB but strong enough to apply a little force to the >> elastomer. It is hard to get at some locations, particularly the ends, >> because the metal clips are in the way. As you slide the card along you >> should see the rows/cols blink off and hopefully the bad rows/cols come back >> to full operation. The cols and rows that are out in the video are on the >> bottom strip. >> >> >> >> >> From: M100 <[email protected]> on behalf of me >> <[email protected]> >> Reply-To: <[email protected]> >> Date: Saturday, April 11, 2020 at 1:07 AM >> To: <[email protected]> >> Subject: Re: [M100] Missing ROM elements >> >> >> >> >> >>> >>> >>> >>> >>> woops i accidently unshared it >>> >>> >>> https://www.omgwtflol.net/nextcloud/index.php/s/7tM2KkR3Q5bCQXf >>> <https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.omgwt >>> flol.net%2Fnextcloud%2Findex.php%2Fs%2F7tM2KkR3Q5bCQXf&data=02%7C01%7C%7C9a4 >>> 683990cf5454f131708d7de832530%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C6 >>> 37222527150801254&sdata=CySORwKhKBmDVi83v5GT9mnv73DATm7q9EPpcysECbQ%3D&reser >>> ved=0> >>> >>> >>> It's reshared. Stupid me. >>> >>> >>> >>> >>> >>> On 4/10/20 9:15 PM, B4 Me100 wrote: >>> >>> >>>> >>>> The link takes me to a login screen? Is there part of the link missing. >>>> >>>> >>>> >>>> >>>> From: M100 <[email protected]> on behalf of me >>>> <[email protected]> >>>> Reply-To: <[email protected]> >>>> Date: Friday, April 10, 2020 at 4:38 PM >>>> To: <[email protected] <mailto:[email protected]> > >>>> Subject: Re: [M100] Missing ROM elements >>>> >>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> https://www.omgwtflol.net/nextcloud/index.php/f/108057 >>>>> <https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.omg >>>>> wtflol.net%2Fnextcloud%2Findex.php%2Ff%2F108057&data=02%7C01%7C%7C9a468399 >>>>> 0cf5454f131708d7de832530%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C6372 >>>>> 22527150811246&sdata=VuFfZ1sKaPpqtmkfFO7lCZlpklaiAGAJkXsyp60ITw8%3D&reserv >>>>> ed=0> >>>>> >>>>>> >>>>> >>>>> >>>> >>> >>> >>> >> >
