Read LG 42LH301C (CHASSIS:LD91A) Service Manual online
B. Power error
No power
Power LED
On?
Y
N
DC Power on
by pressing Power Key
On Remote control
by pressing Power Key
On Remote control
Y
N
Normal
operation?
Check Power
On ‘”High”
On ‘”High”
Check Power cord
was inserted properly
Check
Power LED
Power LED
Replace
Power
Power
B/D
Measure voltage of each output of Power B/D
N
Y
Normal
voltage?
Replace Main B/D
N
Y
OK?
Replace Main B/D
N
Y
Normal?
Check ST-BY 5V
Replace Power B/D
N
Y
Normal
voltage?
Replace Power
B/D
B/D
Y
Standard Repair Process
Established
date
Revised date
2008. 3 .05
6/13
LCD TV
Error
symptom
’
09 years new model apply
mechanical power switch
to reduce power consumption in stand-by status.
If mechanical power switch off
Doesn’t turn on by remote control
Doesn’t appear LED light
Please refer to the A21 Page
6
. Stand-By: Red
. Operating: Green
Check & Repair
Mechanical Power switch
on Local control of TV
Close
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