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The TI-84 Plus CE is a graphing calculator released in Spring 2015 by Texas Instruments. It includes a 2.8 inch color screen, USB port, apps, storage, and a 1200 mAh battery.

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Is there any way to change or repair the ribbon cable?

My screen has white vertical lines and is lacking of colour intensity everywhere. I already did the self diagnostic test, restarted it, reinstalled the os. I really think there is a problem with the flex cable. On ti 83 calculators it was possible to solder cables to replace the ribbon cable, is it possible on ti 84 plus ce?

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Thanks for doing all those troubleshooting steps, that really helps me out!

Unfortunately, you can’t repair the ribbon cable the same way as the TI-83 family since the CE’s ribbon cable is significantly smaller (you can see it circled in the teardown). The community has been unable to find a compatible LCD you can buy separately, so the only way to get a new LCD is to buy a donor calculator. Fortunately, every TI-84 Plus CE (or TI-83 Premium CE) display is compatible with each other. Just be warned that it is not compatible with the TI-84 Plus CSE’s LCD.

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The ribbon cable is attached via a connector that has very tiny solder points. You could try just getting a new screen from another calculator with a different issue, since getting a replacement screen is almost impossible.

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domsflyon will be eternally grateful.
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