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Top screen cable appears slightly disconnected

My TI-83+ recently ran into the infamous glitchy screen issue, and I after checking the bottom screen cable using a multimeter to the best of my abilities, I am pretty sure that the top cable is the problem. Upon closer inspection, it looks like the top cable is slightly disconnected on one side, see images:

(The lines of melted cable are from my poor attempt at solving the issue using a cheap soldering iron, under the assumption that the problem was with the adhesive.)

Is it possible that my screen problems are due to this slight misalignment if the screen cable, and if so, how do I solve the issue?

Edit: After further thought, I think only the black part, which I assume to be the adhesive is misaligned. My question still stands though.

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게시됨: 2024년 9월 13일

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The black part is just tape. I believe it's just to protect the contacts but it's not integral to the ribbon cable.

Be extremely careful when removing the tape because it's still sticky enough to rip the ribbon cable away from the circuit board. I've personally made that mistake and ruined a perfectly good calculator. I'm not sure you can use isopropyl alcohol or a heat gun without damaging the ribbon cable further.

Unfortunately TI designed these to be so unrepairable that nobody has ever found a easy permanent solution, especially not for the fine ribbon cable. Typically the solution is to just solder wires in place of the ribbon cable.

There's a long standing topic for repairing the TI-83 Plus which goes into many of the repair attempts: https://www.cemetech.net/forum/viewtopic...

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Texas Instruments TI-83 Plus

Top screen cable appears slightly disconnected

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