LG OLED55B9PUA

→ Abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
Wrecked audio / Discontinuation / Noise
Wrecked audio/
Discontinuation/
Noise for
all audio
Check and replace
speaker and cable
Wrecked audio/
Discontinuation/
Noise only
for D-TV
Wrecked audio/
Discontinuation/
Noise only for
Analog
Wrecked audio/
Discontinuation/
Noise only for
External Input
Connect and check
other external
device
N
Y
Normal
audio?
Check and fix external device
Replace Power B/D
N
Y
Normal
voltage?
Check input signal
- RF
- External Input
signal
Signal
normal?
(When RF signal is not
received)
Request repair to external
cable/ANT provider
Y
Check audio
B+ Voltage (20V)
Replace Main B/D
(In case of External Input
signal error)
Check and fix external
device
Replace Main B/D
N
End
Established
date
Revised date
11/17
Error
symptom
Standard Repair Process
11
☞A14 & A10/A11
C. Audio error
Copyright © 2019 LG Electronics Inc. All rights reserved.
Only for training and service purposes.