If you have a second M100, it would be interesting to see if the problem follows the LCD. So, move the entire Top half of the M100 to a second machine and see if the problem goes with the top half.
On Wed, Jul 22, 2020 at 1:15 PM Stephen Adolph <twospru...@gmail.com> wrote: > ok this is quite interesting. I'm not sure what to make of that. And you > are sure there is no problem with the "hard reset MENU' screen. > > On Wed, Jul 22, 2020 at 12:26 PM Chris Fezzler <fezz...@yahoo.com> wrote: > >> Here you go. >> >> >> >> On Wednesday, July 22, 2020, 11:52:23 AM EDT, Stephen Adolph < >> twospru...@gmail.com> wrote: >> >> >> a pic of the garbled screen would be great if you can do it.. thanks >> >> On Wed, Jul 22, 2020 at 11:37 AM Chris Fezzler <fezz...@yahoo.com> wrote: >> >> Sorry - typing too fast. Top four lines of the screen. >> >> Yes, mostly garbage all of the time. Except a hard rest will generate a >> proper menu screen. >> Yes, in BASIC the same. But if I type in a test program and hit RUN the >> program will indeed run. >> So the computer is getting the commands/keystrokes. Just not displaying >> bottom four lines. >> >> I think it is a component issue. >> >> >> On Wednesday, July 22, 2020, 09:20:53 AM EDT, Stephen Adolph < >> twospru...@gmail.com> wrote: >> >> >> Hi Chris, >> >> What do you mean by "the top 4". Do you mean top 4 lines on the screen? >> I think so. >> >> So is it correct to say that the LCD bottom 4 lines display garbage at >> certain times >> * not after a (hard) reset - you get a correct MENU display (not just a >> RESET but a HARD RESET?) >> * when you enter BASIC and/or run any software, the LCD bottom half shows >> garbage? >> >> I would suggest that you run a memory test. >> I doubt that you have a fundamental problem with the LCD system, nor the >> keyboard system. >> >> good problem! >> >> >> >> On Wed, Jul 22, 2020 at 9:02 AM Chris Fezzler <fezz...@yahoo.com> wrote: >> >> I'm trying to troubleshoot what components on the circuit board process >> keystrokes and send them to the screen. >> >> The screen and keyboard on my Model 100 are in perfect working order. >> But only the top four are processing correctly. >> >> The bottom four are displaying gibberish. But if I type commands in >> BASIC, they work. So again, not the keyboard or >> screen but components that process the bottom half. A hard rest will >> present a perfect menu screen. But upon entering >> an app, the bottom four lines are not getting proper signal. >> >> Sorry, I'm not an electronics or computer engineer. Just a hobbyist with >> a soldering iron and a willingness to learn. >> Plan to look at Technical Reference Manual to see if I can troubleshoot. >> >> On Wednesday, July 22, 2020, 01:15:25 AM EDT, John R. Hogerhuis < >> jho...@pobox.com> wrote: >> >> >> >> >> On Tue, Jul 21, 2020 at 5:08 PM Chris Fezzler <fezz...@yahoo.com> wrote: >> >> Is there a way to search old Listserv messages so I can research before >> embarrass...err...I mean ask a dumb question. >> >> Seriously, would like to research. >> >> >> >> How old are we talking? >> >> Gmane was our archive until it went down for a long time. Then it was >> back up recently but only accessible through nntp readers. Not sure >> the status of that. >> >> Our GNU Mailman list itself has an archive which goes back to 2011 when I >> took over running the list. >> >> http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/ >> >> Or just ask. We Are The Archive. >> >> -- John. >> >>
