Question about Texas Instruments TI-89 Calculator

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Ti 89 buttons won't work

A few days ago gatorade was spilled over my ti89. It ceased to function after the accident, but then after a day of letting it dry out (without opening/disassembling the calculator) it turned on. My problem is that the "on" button is the only button that actually works. When ever i turn on the calculator i promptly see "installation in progress, do not attempt to interrupt," and then the main menu. I can't do anything because none of the other buttons work.
What should i do? do i have a similar problem: http://www.fixya.com/support/t987653-screen_frozen_calculator_not_responding

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Well, I just waited a few more days and now it works! I'm so happy...

Posted on Jan 15, 2009

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Posted on Jan 02, 2017

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My TI-89 will not turn on or respond in any way. The last time I used the calc was 4 months ago. I tried to turn it on a few days ago but it would not work so I changed the batteries. That didn't work and...


Take out one battery. While holding the "On" button, put the battery back in. I can honestly not explain what happened, but it has happened to me multiple times as well. You might have to do this more than once, but within a few attempts, it should start working again. Tell me how it works out, and hope this helps!

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I received this solution, but at the end the calculator asked me about some invalid certificate. Now the ti 89 is stuck at the boot screen because if I retry, it goes thru the whole process again and asks...


Hello,
The answer I gave you was taken verbatim from the TI FAQ and knowledge base. I copied and pasted the part relevant to you calculator.
In any case, I sent an e-mail message to ti-cares@ti.com, giving the link to your original question and my answer to it. I took the liberty to copy/paste your present message. I also asked about that invalid certificate.
All we can do know is wait for their reply.

k24674.

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TI89 buttons not functioning


SEND IT INTO Ti, LET THEM CECK IT OUT, FOR A SMALL FEE IT'S WELL WORTH IT.
IT'S BETTER THAN BUYING A NEW ONE, PLUS THAY WILL
FIND THE PROBLEM AND INTSTALL THE LATEST VERSION SOFTWARE IF NEEDED TO BRING IT UP TO LATEST CONFIG, AS THAY DID TO MINE.

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