Display - Motorola 6864115B62-C Detailed Service Manual

3-10 TROUBLESHOOTING CHARTS
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
A0 / D0...D7 / CS1 U0871
of U0971
?
YES
Check / Replace
Flex connection
Resistors on Address & Data
lines and LCD Module