LG 43UF640 Series Service Manual page 35

Standard Repair Process
Error
symptom
A17
Check
Power
Logo LED LED On?
. Stand-By: Red or Turn On
. Operating: Turn Off
Check Power cord
was inserted properly
Normal?
Close
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
B. Power error
No power
DC Power on
Y
by pressing Power Key
On Remote control
N
N
Y
Check ST-BY 3.5V
A18
Normal
operation?
Measure voltage of each output of Power B/D
Y
Normal
voltage?
Normal
voltage? Y
Replace Power B/D
N
Replace Power B/D
6
Established
date
Revised date
A18
N
Check Power
OK?
On '"High"
Y
Replace Main B/D
A18
Y
Replace Main B/D
N
6/16
Y
Replace
Power B/D
N
LGE Internal Use Only