Question about Texas Instruments TI-89 Calculator

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My ti89 titanium doesn't turn on

I left alone for one week and i tried to turn it on but it doesn't turn on. how can i trouble shoot it?

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I had the same problem. I changed the batteries and it didn't work. I took out the batteries for about 30 minutes, and then put them back in, and it turned on.

Posted on Mar 06, 2008

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I had the same problem with Ti89. I installed new sets of four AAA Energizer batteries but Ti89 didn't turn on. I tried replacing the backup battery "303" which costs $4 BTW. But it didn't do anything and a waste of money. Finally I checked the AAA batteries one by one on my Multimeter and found that one of the AAA batteries had a reversed polarity for some weird reason. I guess in must have been made that way in Energizer factory or something. So I throw that one out and replaced it. NOW IT WORKS!
FYI: I checked to see if Ti89 would work without the backup battery and it totally works! So don't bother replacing those unless you have some data stored in memory you don't want to lose.

Posted on Nov 04, 2011

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Replacing the batteries (including the back up batteries) will fix this problem.

Posted on Aug 27, 2007

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Press and hold the 2ND, left-arrow, and right-arrow keys, then press and release the ON key.

If this doesn't reset the TI-89, please respond to this post and we can go on to the next step.

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Try a hard reset. Warning: this will clear all memory.

1. Press and hold left arrow, right arrow, and 2nd keys.

2. Press and release ON.

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