Wrecked Audio/Discontinuation/Noise - LG 43LH54 Series Service Manual

Standard Repair Process
Error Symptom
Content
Check input
signal Signal
-RF Normal
-External Input
N
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Only for training and service purposes
C. Audio Error
Wrecked audio / Discontinuation / Noise
Y
Noise only for D-TV
Noise only for Analog
(When RF signal is not
received)
Request repair to external
cable/ANT provider
(In case of
External Input
signal error)
Check and fix
external device
Wrecked Audio/ Check and replace
Discontinuation/ speaker and
Noise for all audio
connector
Wrecked Audio/
Discontinuation/ Replace Main B/D
Wrecked Audio/
Discontinuation/
Wrecked Audio/
Connect and check
Discontinuation/
other external
Noise only for
External Input
Established date
Revised date
☞A13
Check Voltage 19V
of Adaptor
Normal
Voltage
N
Replace Adaptor
device
N
Normal
Audio
Y
Check and fix external device
10/14
Y
Replace Main B/D End
LGE Internal Use Only