Power Error - LG 49UF77 Series Service Manual

Standard Repair Process
Error
symptom
☞A17
Check Power
Logo LED 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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B. Power error
No power
DC Power on
Y
by pressing Power Key
On Remote control
N
Check ST-BY 3.5V
☞A18
Replace Power
B/D
Established
Revised date
Normal
operation?
Y
☞A18
Measure voltage of each
output of Power B/D
Y
Normal
voltage?
Normal
Y
voltage? N
Replace Power B/D
N
6
date
☞A18
N
Check Power
OK?
On '"High"
Replace Main B/D
Y
Replace Main B/D
6/16
Y
Replace
Power B/D
LGE Internal Use Only