LG 86UH5C Service Manual page 27

Standard Repair Process
Error symptom
DC Power on
by pressing Power Key
On Remote control
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Only for training and service purposes
B. Power error
No power
☞A12
N
Normal Check Power
On '"High"
operation?
Y
☞A12
Measure voltage of each
output of Power B/D
Y
Normal
Replace Main B/D
voltage?
N
Replace Power B/D
Established
date
Revised date
Y
Replace
OK?
Power B/D
Replace Main B/D
5
5/11
LGE Internal Use Only