In Case Of Difficulty - Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book

• To replace thebackup battery, remove the screw from the backup battery cover, and then
remove the cover. Install the new battery, + side up. Replace the cover and secure it with
the screw.
4. Replace the battery compartment cover. Turn the graphing calculator on and adjust the
display contrast, if necessary, by pressing y } or †.

In Case of Difficulty

Handling a Difficulty
To handle a difficulty, follow these steps.
1. If you cannot see anything on the screen, you may need to adjust the graphing calculator
contrast.
To darken the screen, press
sufficiently dark.
To lighten the screen, press
sufficiently light.
2. If an error menu is displayed, follow these steps:
• Note the error type (
• Select
2:GOTO
the error location.
• Determine the error.
• Correct the expression.
Refer to the Error Conditions table for details about specific errors, if necessary.
3. If the busy indicator (dotted line) is displayed, a graph or program has been paused; the TI-84
Plus is waiting for input. Press Í to continue or press É to break.
4. If a checkerboard cursor ( # ) is displayed, then either you have entered the maximum number
of characters in a prompt, or memory is full. If memory is full:
Press y L
•
• Select the type of data you want to delete, or select
types. A screen is displayed listing each variable of the type you selected and the number
of bytes each variable is using.
Press } and † to move the selection cursor (4) next to the item you want to delete, and
•
then press {.
release y, and then press and hold } until the display is
and
release y, and then press and hold † until the display is
and
).
ERR:error type
, if it is available. The previous screen is displayed with the cursor at or near
to display the
2 MEMORY MANAGEMENT / DELETE
Appendix C: Service and Warranty Information
menu.
for a list of all variables of all
1:All
402