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The TI-30X IIS is a scientific calculator with trigonometric functions first introduced by Texas Instruments in 1993. It uses both a battery and a solar cell for power.

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Automatically adds a digit to the end of my entry

My calculator automatically adds a 9 to my last number every time I try to do math. For example, I type 5 + 6 and expect =11, but calculator does 5 + 69 and I get =74 :(

The 9 button does not appear to be sticky.

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Technical support just helped me fix the same issue. You need to reset the calculator. Press the "2nd" key followed by "0". Arrow down to option 2 "yes". Problem fixed.

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6 Comments:

worked for me ty

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This worked for me thanks so much

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Mahalo! That worked for me, too.

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OMG! I can't believe it was that easy to fix. Thank you very much!

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mine kept adding 0.5, and this just fixed it, thanks so much!!

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One of my calculators is adding a digit to the end of each entry.

I know how to reset the calculator but when I try, I am unable to arrow over to Y on this screen:

RESET: N Y

I also tried holding down ON and CLEAR at the same time but that is not working to reset the calculator either.

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thank you so much

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shorted PCB keys, try to clean the PCB keys with alcohol (To dismantle, you'll need to apply hot air on the boss around 200°C)

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Does anyone know how to do this on purpose?

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I’m also curious about how to make this happen on purpose. Thanks for the solution by the way, real life-saver

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Michelle Leonard será eternamente grato(a).
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