Calculation ok but some vertical rows of dots matrix not displayed. It is very hard to read...
You can try opening up the calculator (an exercise in itself, need to pry it open - use a plastic prying implement if you don't want to damage the edges) and you will see the display attached to the main board with a film ribbon. Believe it or not, this is GLUED to the board. You can sometimes bring these back to life by applying heat to the join from a hair dryer. This will soften the glue and remake the connection. This worked for me once, but it was delaying the inevitable and mine is now both broken and lost :(
Posted on May 09, 2008
very good hint, I've tried with a small hot air generator and now the display works great! I suggest not to go beyond 150°C
ciao - arturo
I'd like to add that I have just fixed my TI-68 with the exact same problem by doing the above. Many thanks for posting! I love my TI-68 :o)
This worked for me as well. I was about to throw it away and stumbled on this. Had to re-apply heat several times though, raising the dead so to speak :)
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I actually have two of these calculators, both with the display problem.
I like the logic and layout of these calculators and TI should make a "new" one with the same layout etc. It's probably just the display.
JackRaven Metrologist
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