Display - Motorola GM328 Service Manual

3-10 Controlhead GM398 Troubleshooting Flow Chart
3.4

Display

Power Up Alert Tone is audible, volume knob does operate,
indicator/backlight is on but nothing is seen on the display.
TP0973
Voltage Sense
Check / Replace
between YES
LCD Module
2V and 2.4V
?
NO
Activity on
Address & Data lines Check for shortage
NO
U0871
A0 / D0...D7 / CS1
of U0971
?
YES
Check / Replace
Flex connection
Resistors on Address & Data
lines and LCD Module