LG OLED77C2 Series - Power Error Troubleshooting

Established
date
Revised date
Error
symptom
No power
Power
LED On?
Y
N
DC Power on
by pressing Power Key
On Remote control
Y
N
Normal
operation?
Check Power
On ‘”High”
Check Power cord
was inserted properly
Check
LED
Replace
Power B/D
Measure voltage of each
output of Power B/D
N
Y
Normal
voltage?
Replace Main B/D
Y
OK?
Replace Main B/D
N
Y
Normal?
Check Main ST-BY 3.5V
Replace Power B/D
N
Y
Normal
voltage?
Replace Power B/D
Y
☞A8
☞A9
☞A9
☞A9
Standard Repair Process
6
. Stand-By: Red or Turn On
. Operating: Turn Off
Close
B. Power error
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