Troubleshooting
C.1 Troubleshooting Guide
Text Display (TD) User Manual
164 System Manual, 08/2008, A5E00765548-03
Problem Possible Cause Possible Solution
Display backlight is on, but no message
is displayed
Program checksum failure Defective hardware: Replace with a
new TD device
User cannot access the TD system
menus
The custom keypad does not contain
the ESC and ENTER buttons
To restore the standard TD keypad:
1. Power down the TD device
2. Press and hold the lower right
corner (where ENTER key is
located on the standard keypad)
3. Power up the TD device
The default keypad is restored until the
TD device is power cycled again.
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