55LB630V - 55LB631V _ LG LCD TV _ Troubleshooting _ No Power _ No Sound [picture OK] _ Display Error
NO POWER
Check power input voltage and ST-BY 3.5V
Checking method when power is ON [Check
Power On pin is HIGH]
Power error _Off when on, off whiling
viewing [POWER OFF MODE checking method]
* Press the IN-START button of the remote controller for adjustment
* Check the entry into adjustment item 3
AUDIO ERROR No audio/Normal video-3
[Checking method in menu when there is
no audio]
* Press the Setting button on the remote controller
* Select the Sound function of the Menu
* Select the Sound Out
* Select TV Speaker
Voltage and speaker checking method when
there is no audio
> Check the contact condition of or 24V connector of Main Board
> Measure the 24V input voltage supplied from Power Board (If there
is no input voltage, remove and check the connector)
> Connect the tester RX1 to the speaker terminal and if you hear the
Chik Chik sound when you touch the GND and output terminal, the speaker is
normal.
REMOTE CONTROLLER OPERATION CHECKING [Function error_ No response in remote
controller, key error]
* Check IR cable condition between IR & Main board
* Check the St-by 3.5V on the terminal 16.
When checking the Pre-Amp when the power is in ON condition, it is
normal when the Analog Tester needle moves slowly, and defective when it does
not move at all.
COLOR ERROR Display has error especially color [V-Com
checking and adjust method]
* Press the ADJ button on the remote controller for adjustment.
* Enter into V-Com of item 14.
* Check and adjust V-Com value.
CLICK ON THE PICTURES TO MAGNIFY
