Power Error - LG 86QNED99TPB Service Manual

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Standard Repair Process
Error
symptom
☞A8
Check front
Power
Power Indicator
LED On?
. Stand-By: Red or Turn On
. Operating: Turn Off
Check Power cord
was inserted properly
Normal?
Close
B. Power error
Y
N
N
Y
Check Power ST-BY 7.8V
☞A9
No power
DC Power on
by pressing Power Key
On Remote control
Measure voltage of each
output of Power B/D
Y
Normal
Y
voltage?
Replace Power B/D
N
Replace Power
B/D
Established
date
Revised date
☞A9
N
Normal
Check Power
On '"High"
operation?
Y
☞A9
Y
Normal
Replace Main B/D
voltage?
N
Copyright © 2021 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
6/17
Y
Replace
OK?
Power B/D
N
Replace Main B/D

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