LG 50UL3G Service Manual page 26

Standard Repair Process
Error
Monitor Signage
symptom
Check
input
signal
Check and fix
external device/cable
D. Function error
External device recognition error
Check technical
Y
Signal information
input?
- Fix information
- S/W Version
N
Established
Revised date
N
Technical External Input
information? Recognition error
Y
HDMI/ RGB
DVI/DP, Optical
Fix in
Recognition error
accordance
with technical
information
11
date
Replace Main B/D
Replace Main B/D
Copyright ⓒ 2020 LG Electronics Inc. All rights reserved.
Only training and service purposes.
11/13