Wednesday, December 11, 2013

HOW TO TROUBLESHOOT-SAMSUNG LN SERIES LCD TV - NO POWER - NO VIDEO


APPLICABLE TO:  LN26B450C4M  _ LN32B450C4M _  LN37B450C4M _ LN40B450C4M _LN32B460B2M_LN32B530P2M_ LN37B530P2M _ LN40B530P2M _ LN46B530P2M
NO POWER
Symptom
  • The LEDs on the front panel do not work when connecting the power cord.
  • The SMPS relay does not work when connecting the power cord.
  • The units appear to be dead.
Major checkpoints
The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
  • Check the internal cable connection status inside the unit.
  • Check the fuses of each part.
  • Check the output voltage of SMPS.
  • Replace the Main Board.
DIAGNOSTICS
CLICK ON THE PICTURES TO MAGNIFY

No Video (Analog PC signal)
Audio is normal but no picture is displayed on the screen.
  • Check the PC source
  • Check the SEMS12
  • This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
DIAGNOSTICS