LG 43LF5900 Service Manual page 46

Standard Repair Process
Error
symptom
☞A17
Check
Power LED
Power LED On?
. Stand-By: Red or No color
N
Check Power cord
was inserted properly
Normal?
Y
Close
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B. Power error
No power
DC Power on
Y
by pressing Power Key
On Remote control
N
※
Check ST-BY Voltage
(D13V)
☞A18
Established
Revised date
Normal
operation?
Y
☞A5
Measure voltage of each output of Power B/D
Y
Normal
voltage?
Normal
Y
voltage?
N
Replace Power B/D
N
Replace Power
B/D
date
☞A18
N
Check Power
OK?
On "High"
Replace Main B/D
Y
Replace Main B/D
6/13
Replace
Y
Power
B/D
LGE Internal Use Only