I may have time on Friday night to crack her open. Thanks for the
advice. I'll let you know how it turns out.
Turns out I have plenty of de-oxit in the hangar. Now if the spouse will
just let me leave the house for a bit I can grab some.
On 4/7/20 7:27 PM, B4 Me100 wrote:
This looks like the old oxidation of the contacts problem for the screen.
It is not a cable problem otherwise the rest of the screen would be faulty.
The trick I personally use is to take a piece of thin-ish card and slide
it very, very, very gently along the elastomer material that connects the
screen panel to the board. You may also want to spray on a little de-oxit
or similar to clean the contacts as you massage the elastomer.
You will need to remove the screen PCB from the case (four screws hold it
in), then the elastomer strip sandwiched between the board and panel will
be visible. I tend to power up the machine when I do this just so I can
see which rows/cols are being cleaned, but it is not necessary. The rows
appear to be ones controlled on the bottom of the screen towards the left
side of the elastomer strip. You may also want to look for any general
corrosion around the area.
Just be very careful, they do not need to be moved much. I have used
this trick on quite a few panels with similar problems and generally it
works very well.
The other option is to remove the screen PCB from the case and see if the
problems clear, sometimes the mere flexing of the screen PCB when it is
removed can fix the problem - over time the boards can warp slightly. This
happened with the last LCD I repaired, removed the screen to clean the
contacts and once it was removed it worked perfectly. Put it back into
its case and it has been fine ever since.
Quite interesting to put a voice and hand to the email :-D
On 7/4/20, 6:03 PM, "M100 on behalf of me"
<[email protected] on behalf of> wrote:
<SNIP>
Here's a quick vid I made of the screen output. The columns don't really
become apparent until there's a full screen of text on display.
<SNIP>
