Texas Instruments TITANIUM TI-89 - Manual (Page 950)

Appendix B: Technical Reference 951
In Case of Difficulty In Case of Difficulty In Case of Difficulty In Case of Difficulty
If you have difficulty operating the TI-89 Titanium / Voyage™ 200, the following
suggestions may help you correct the problem.
If: Suggested action:
You cannot see
anything on the display.
Press ¥ « to darken or ¥ | to
lighten the display contrast.
The BATT indicator is
displayed. Replace the batteries. If BATT is
displayed in reverse text (
),
replace the batteries as soon as
possible.
The BUSY indicator is
displayed. A calculation is in progress. If you
want to stop the calculation, press
´
.
The PAUSE indicator is
displayed. A graph or program is paused and
the TI-89 Titanium / Voyage 200 is
waiting for input; press
¸ .
An error message is
displayed. Refer to the list of error messages
in this module. Press
N to clear.
The TI-89 Titanium /
Voyage 200 does not
appear to be working
properly.
Press N several times to exit any
menu or dialog box and to return
the cursor to the entry line.
— or —
Be sure that the batteries are
installed properly and that they are
fresh.