LG 55EC9300 Repair Manual page 94

Standard Repair Process
LCD TV
Check
input
signal
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Only for training and service purposes
D. Function error
Error
symptom
External device recognition error
Check technical Check technical
Y Y
information
Signal
- Fix information
input?
- S/W Version
N
Check and fix
external device/cable
Established
date
Revised date
External Input and
N
Technical
Component
information?
Recognition error
Y
HDMI/ HDMI/
DVI, Optical
Fix in
Recognition error
accordance
with technical
information
14
2013.01.31
14/16
Replace Main B/D
Replace Main B/D
LGE Internal Use Only