Question about Texas Instruments TI-89 Calculator
The calculator that I have is all blue or black when I turn it on. I tried using contrast but it didn't work. Can some one help me get rid of this problem
The right way to set contrast is
1.Press [Diamond] key, release it
2. Press [+] and release it (to increase contast) or [-] to decrease.
3 repeat steps 1, 2 till contrast is adequate.
If you follow procedure and it does not work resel machine to factory default [2nd][MEM] [F1]
Hope it helps
Posted on Sep 05, 2009
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Posted on Jan 02, 2017
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