Question about Texas Instruments TI-84 Plus Calculator

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Screen is upside down as I type

It appears that a student of mine has played with her calculator, and it displays everything you type upside down. I cleared the RAM and nothing. Help.

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Was it a prank ?
I have read that to invert the LCD-screen you just flip the polarisation-plate (the plastic film that sits over the LCD display) 180º, that is , upside down.

Posted on Aug 07, 2009

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Wow. Just wow. How did that person do that?! Anyways, try resetting ALL of the memory, and see if that helps, if not, ask the student what she did so that it can be reversed (probably by doing the same steps in the opposite order.

Posted on May 26, 2009

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1 Answer

How to fix in upside down calculator screen


The calculator may have been subjected to a hacking procedure found on the Internet. Find a way to undo the hack or buy another calculator. Or hold it upside down to read the display (once you get the last result.)

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Hello,
Check this article. It will show you how to force the reinstallation of the OS. If that does not solve your problem, you may have to send calculator for service.

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I have read that to invert the LCD-screen you just flip the polarisation-plate (the plastic film that sits over the LCD display) 180º, that is, upside down.
Did you or someone opened your calculator? He might have reassembled it wrong. Or was it a prank?
If that was not the case, your best change is to reset the calculator and see if it solves your problem.
To manually reset your graphing calculator:
  • Remove all AAA batteries.
  • Remove the back up lithium battery.
  • Leave the unit empty for 5 to 10 minutes.
  • After the 5 to 10 minutes, place all the batteries back into the graphing calculator.

This process should restore the graphing calculator to the factory settings.

Good Luck!

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Well i had the same thing happen with mines. So I played and played with it for like 45 minutes and then i figured it out. I turned it upside down and did the same thing where you have to slide it but i slided it upside down (Or Above the slide Bar) so after that it should work then everything will be opisite on the phone intill I did the
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http://forums.techguy.org/tech-tips-tricks/336002-windows-xp-flipping-screen-upside.html

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