Question about Texas Instruments TI-83 Plus Calculator

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It wont turn on

My TI 83 wont turn on. changed the batteries still doesnt work. It wont respond to anything. Any ideas

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  • Anonymous Dec 28, 2007

    I have the same problem as jake 128d, replaced both sets of batteries,tested voltage at brass contact points the + and - and got 6.13v,tested voltage on outer battery springs and got 4.53 v.I removed backing and cleaned spring contacts as well as the lower copper squares as suggested but still no joy.Is there any other things i can try?

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On TI-83 Plus and TI-83 calculators that have the newer flat screen (as opposed to the first generation TI-83 with the tilted screen):

1. Open the battery compartment cover
2. Install known working batteries
3. Using a voltmeter, insert probe ends into the holes right beneath the 2 center batteries and touch the circuit board on either side. One is a (+) side and the other is a (-) side, so both must be touched. Be careful to ONLY touch the copper square of the circuit board. If your voltage reads 0 or very low (1-2 volts) proceed to step 4. If your voltage reads about 6 volts, your problem lies elsewhere.
4. Using a voltmeter, insert probe ends on the bottom of the 2 outside batteries where the springs are visible. If voltage reads about 6 volts, proceed to step 5. If voltage reads 0, your problem is that the springs are not making good contact with the batteries due to corrosion or weak springs. You will need to clean them or get donor parts. Find a calculator with a broken screen that comes on and swap the back covers. Details on how to remove the back cover further on.
5. Using a T6 torx electronics screwdriver remove all 6 screws on the back and using a small phillips, remove the backup battery cover.
6. WARNING! Disassembling your calculator can cause unrepairable damage. Only proceed if you have no other options! Using a small flat electronics screwdriver, pry into the case on the side about 4 ridges up where there is a small hole. Pop both sides open and break case away from the bottom to the top- NEVER FROM SIDE TO SIDE. (Going from side to side can damage the I/O port.)
7. Look at the copper squares at the bottom of the board. You can see where 2 springs make contact from the back cover. Often this is dirty, corroded, or the springs are weak and not making contact. Clean this area with alcohol and gently scrape away any oxidation.
8. Put calculator back together and test. When a calculator will not turn on, this is likely the culprit.

I have fixed several calculators with this method.

Posted on Dec 17, 2007

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1 Answer

Ti-83 won't turn on


TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on. Turn the calculator on (or at least press the ON key). Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.

If the screen remains blank then please respond to this post and we'll go from there.

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I am sorry that I could not respond earlier. I am not sure of this but I think you can remove the back up battery and also the main battery, check the cells to see if there was a drain on the new cells , if so there is a short in the unit. If not keep aside for few hours and then replace the back up and then the main cells.
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TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on. Turn the calculator on (or at least press the ON key). Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.

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This is from TI FAQS:

Solution 11900: Troubleshooting a TI Graphing Calculator That Will Not Turn On.

For the TI-83 Plus Family, TI-84 Plus Family:
Caution: The resets described in these troubleshooting steps will cause a loss of applications, programs and data. If at all possible please create a backup using TI Connect™ first.
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Well i suggest calling Texas Instruments
The chances of this happening are rare, but the back up
battery probably died. This could probably cause data loss
and you might lose the program and function data. Call and ask
to see what you could do.

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