Communication Error(Display Led Off) - LG LMC25780 series Service Manual

Because the signal of Tx and Rx is composed of the combination of digital code,
TIP
you can't measure the voltage exactly.

10-8 Communication Error(Display LED off)

Defect Symptom
1 Check for a loose connection.
2 Check the Purple to Red.
<Lamp Cover>
(1)RD (2)PR
<CON101>
Test Point Result
(1) To (2) 12V
- 49 -
Check Point
<CON101>