LG 55EC9300 Repair Manual page 86

Standard Repair Process
LCD TV
☞A17
Check
Logo LED Logo LED
. Stand-By: Red or Turn Off
. Operating: Turn Off
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Only for training and service purposes
Error
symptom
Y
Power LED
On? On?
N
Check Power cord
was inserted properly
N
Normal?
Y Y
※
Close
Check ST-BY 3.5V
☞A18
B. Power error
No power
DC Power on
by pressing Power Key y p g y
On Remote control
Measure voltage of each output of Power B/D
Y
Normal
Y
voltage?
Replace Power B/D Replace Power B/D
N
Replace Power
B/D B/D
6
Established
2013.01.31
date
Revised date
☞A18
N
Normal Check Power
operation? operation? On '"High" On '"High"
Y
Replace Main B/D
☞A18 ☞A18
Y
Normal
Replace Main B/D
voltage?
N
6/16
Replace
Y
OK?
Power Power
B/D
LGE Internal Use Only