Texas Instruments -84 Plus, Руководство пользователя

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Appendix C: Service and Warranty Information 667
In Case of Difficulty In Case of Difficulty In Case of Difficulty In Case of Difficulty
Handling a Difficulty
Handling a Difficulty Handling a 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
and
release
y
, and then press and hold
}
until the
display is sufficiently dark.
To lighten the screen, press
and
release
y
, and then press and hold
†
until the
display is sufficiently light.
2. If an error menu is displayed, follow these steps:
• Note the error type (
ERR:
error type
).
• Select
2:GOTO
, if it is available. The previous screen is displayed with the cursor
at or near the error location.
• Deteremine 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
2
to display the
MEMORY MANAGEMENT / DELETE
menu.