No Power - LG 42LB5800 Service Manual

Standard Repair Process
Error Error
LCD TV
symptom
☞A17 ☞A17
Check Power LED
Power LED
. Stand-By: Red or Logo Light ON
N
. Operating : off
Check Power cord
was inserted properly
Normal?
Y
Close
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Only for training and service purposes
B. Power error
Y
On?
N
※
Check ST-BY 3.5V Ch k ST BY 3 5V
☞A18

No power

DC Power on
by pressing Power Key
On Remote control
Measure voltage of each output of Power B/D
Y
Normal Normal
Y
voltage?
Replace Power B/D
N
Replace Power
B/D
8 / 97
Established
2014 1 2 2014. 1 .2
d t date
Revised date
☞A19 ☞A19
N
Normal Check Power
operation? On '"High"
Y
☞A4
Y
Normal
Replace Main B/D
voltage?
N
6/13
Replace
Y
OK?
Power
B/D
Replace Main B/D
LGE Internal Use Only