Question about Texas Instruments TI-84 Plus Calculator

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New batteries but will not turn on. had to buy

New batteries but will not turn on. had to buy son a new one for test tomorrow. what can i check. it worked yesterday.

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Hi,

First of all, and I mean no offense here, check that the batteries are inserted correctly, respecting the polarity +-+-. The flat part (bottom) of the battery is the one that sits on the protruding helix-like electrical terminal. Inside calculator, there is polarity diagram.

When you change batteries, the display contrast may become too dim (too light) for the user to see anything. In that case, it can be adjusted.

Adjusting the screen contrast. Here is how to do it.
There is a key labeled 2nd. It is blue on the TI84Plus, and yellow/orange on the TI83Plus.

  1. Press the [2nd] key and release it.
  2. Press the UpArrow key (the top of the long vertical key in the Malta Cross like group of keys) and HOLD.
  3. On the top right corner of the screen you will see a number, which tells you the degree of contrast.
  4. Release the UpArrow key when contrast is adequate for your viewing.
  5. If you darken the screen too much, lighten it by the same procedure, pressing the DownArrow.( See #1 and 2 above)
  6. A final suggestion: Repack the new calculator with all its accessories (cables, user guide, batteries, etc..), grab the sales receipt, drive to the store where you bought it, return it and ask for a refund.
Hope it helps.
Thank you for rating this solution.

Posted on Dec 11, 2009

Testimonial: "Thank you so much. I followed the steps you provided and it works great. Hopefully Walmart will take the other back. Thanks again!!!"

  • k24674 Dec 11, 2009

    Your thanks are heartwarming during this cold season (in the Northern Hemisphere), but an extra thumb up will have put the cherry on the cake. Merry Christmas to you and yours, Happy Hanukkah. Happy Diwali. Happy New Year.

  • k24674 Dec 15, 2009

    Very Stange Indeed. Why would somebody whose problem I solved completely, show appreciation by rating the solution 4 thumbs up, then come back a few days later to rate it down. I feel the nefarious doings of some devil at work. Vade retro Satanas!!!

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