Took a battery out, put it back in and it wouldn't turn on.
I took a battery out of my TI-81 that I recently bought on eBay, and as soon as I put it back in, the calculator would not turn on. It had been working perfectly fine right before then. I don't know if anyone will be able to help, but I'd be extremely grateful if someone could. Thanks in advance.
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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.
If this doesn't do it, please append a comment to this post and we'll go on from there.
Did you turn the phone off before removing the battery? I sure hope so. If not, you may have to junk it. My father has done that to several phones now. He pops the battery out to put the charged on in, but forgot to turn the phone off. I just recently bought him a phone that sets itself to power off when the battery cover is popped off.
Solution that worked for me, taken from "Ti-89 titanium wont turn off":
posted on Mar 05, 2008
Guest Rank: Apprentice
Rating: 0%, 0 votes
I was able to fix the problem nut it requires several steps and only
offers a temporary fix (untill the calculator is reset then it needs to
be done again).
1. Press F5, then Dimond (symbol on buttion) then "Clear"
2. Press "alpha" then "S"
3. Press "0" dont mess with anything else here
4. Press "2nd" then "Quit"
Now you can turn it off but are missing the bottom text (rad,auto, etc...) to fix
6. Press "Mode" change radian to degree then "enter"
Now the text is displayed showing the mode.
7. Set the mode back to radian by reversing step 6.
Thats it I dont know how to get the bottom line back though...