Question about Texas Instruments TI-85 Calculator

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Won't power up, flat line across screen - battery problem?

My screen just powers up to a horizontal line. Does the smaller backup battery need replacing? Is something else wrong? Thank you.

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Yes, this sounds like you'll need to replace your back-up batteries. That will probably resolve the problem.

Posted on Aug 27, 2007

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How do I fix horizontal thin lines across the screen?


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

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I have a 2" black line at the top of the tv. And also smaller black lines across the middle of the tv.


Dear Jeff,
It seems like the Horizontal IC in your TV is dying. This and the Vertical IC is responsible for displaying images on your TV. (Look at your TV through your Phone Camera and you will see upward scrolling lines.This is the Horizontal IC in action.)
I would strongly advise you to get your TV repaired immediately.

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1 Answer

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