LG 49UB850T - Audio Error; No Audio; Normal Video

B. Power error
No power
Standard Repair Process
Established
date
Revised date
6/16
LCD TV
Error
symptom
2013.01.31
No
power
DC Power on
N
Rl
☞A17
☞A18
Revised
date
6/16
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
Check
Logo LED
R
ep
l
ace
Power
B/D
Y
OK?
Replace Main B/D
. Stand-By: Red or Turn On
. Operating: Turn Off
Check
Power
cord
was inserted properly
Measure voltage of each output of Power B/D
Replace
Main
B/D
N
Normal?
☞A18
Y
Normal
volta
g
e?
Replace Main B/D
Y
Y
※
N
g
Check ST-BY 3.5V
Replace Power B/D
N
Y
Normal
voltage?
☞A18
Close
Replace Power
B/D
6
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