Question about Texas Instruments TI-89 Calculator
Try to take all the battries out including the back up battery and put them all back in and turn it on and see if that fxes it
Posted on Apr 11, 2007
Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Good luck!
Posted on Jan 02, 2017
528 people viewed this question
Usually answered in minutes!
my calculator is frozen and the illegal instruction label is on the top i cannot turn it on or off
illegal insurction
My claculator is frozen and it says illegal instruction at the top of the screen and i replaced all of the batteries and it still says the same thing
×