Question about Texas Instruments TI-89 Calculator
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 that doesn't do it, reset the calculator. Press and hold the lef-arrow, right-arrow, and 2ND keys, then press and release the ON key.
If that doesn't do it, remove one of the four AAA batteries. Press and hold the ) and (-) keys while replacing the battery. Continue to hold the two keys down for at least five seconds before releasing them.
Posted on Aug 30, 2010
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Posted on Jan 02, 2017
SOURCE: TI 89 problem
Try doing a hard reset (hold simultaneously Left + Right + 2nd + On). If it just isn't wanting to display properly, but does turn on, that might help. I think you can do the same thing by taking the four AAA's out and the spare CR1616/CR1620. Otherwise, the battery acid probably ate one of your components and it's time to repair/replace your handy-dandy.
Posted on Oct 03, 2009
SOURCE: TI-89 frozen disolay
Here's the procedure for a hard reset. Be aware that it will clear all RAM.
1. Press and hold the left-arrow, right-arrow, and 2nd keys.
2. Press and release the ON key.
Posted on Jan 16, 2010
This error is due to 3rd-party software not compatible with the Operating sytem. The software is trying to access a memory address (location) reserved for the OS or for an application.
To correct it:
The following procedure will completely reset the calculator. Note that this will erase the memory of the calculator and restore all manufacturer's defaults.
• Hold down the following keys [2nd] [<] and [>] (right and left arrow keys)
• Press [ON]
• Release all the keys at the same time
• Adjust the contrast, if necessary.
Posted on Feb 03, 2010
A hard reset will clear all RAM:
Press and hold the left-arrow, right-arrow, and 2ND keys. Then press and release the ON key.
If that doesn't do it, this process will clear all RAM and flash ROM:
Remove one of the four AAA batteries. Press and hold the (-) and ) keys. Reinstall the battery. Continue to hold down the (-) and ) keys for five seconds before releasing.
Posted on Apr 26, 2010
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