LG 86UH9500 Service Manual page 107

Standard Repair Process
Error
symptom
☞A17
Check Power LED
Logo LED On?
. Stand-By: Red or Turn On
N
. Operating: Turn Off
Check Power cord
was inserted properly
Normal?
Y
Close
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Only for training and service purposes
B. Power error
No power
DC Power on
Y
by pressing Power Key
On Remote control
N
☞A18
※
Check ST-BY Voltage
Normal
operation?
☞A18
Measure the each output
voltage of Power B/D
Y
Normal
voltage?
Normal
Y
voltage?
N
Replace Power B/D
Replace
Power B/D
6
Established
date
Revised date
☞A18
N
Check Power
On '"High"
Y
Replace Main B/D
Y
Replace Main B/D
N
6/15
Replace
Y
OK?
Power B/D
LGE Internal Use Only