Troubleshooting - LG LSC27990TT Service Manual

TV-RADIO
S5. TROUBLESHOOTING
5-1. General
No. Poor
1 No Picture
2 Poor Picture
5-2. TV
No. Poor
1 No Sound
2 Poor Radiant heat
Fan
3 No TV broadcast
4 Button does not
work
5 Remote Control
does not work
5-3. FM Radio
No. Poor
1 No Sound
Symptoms
1) No P401, P501 connector
2) Poor TV Main PCB
1) Poor LCD Lamp
2) LCD Connector
Symptoms
1) No P601, P602 connector
2) Poor speaker
3) Poor TV Main PCB
1) Fan turning abrades wire and tape.
2) Poor Fan
1) No TV connection
(Hinge Cover, Back TV)
1) No P105 connector
2) Poor switch
1) No P105 connector
2) Poor Remote Control sensor
3) Poor Remote Control
Symptoms
1) Poor FM Radio Tuner
- 91 -
Adjustment
1) Check P1 connector and switched on
2) Change the TV Main PCB
1) Change the LCD
2) Check connector and switched on
Adjustment
1) Check connector and switched on
2) Change the speaker
3) Change the TV Main PCB
1) Detach Fan and remove the
interference.
2) Change the Fan
1) Check connection and switch on
1) Check connector and switch on
2) Change the Button PCB
1) Check connector and switched on
2) Change the Button PCB
3) Change the Remote Control
Adjustment
1) Charge FM Radio Tuner.