Re: 42lg3000-za No Picture but got sound

Assemble all parts together.
Plug in all connectors.
Power on the lcd. Whith your multimeter set on DC , check between pins 1,2,3,4 or 5, and 6,7,8,9 or 10 ,on master inverter power plug CN1, if there is 24Vdc, if so, check between pins 6,7,8,9 or 10 and pin 12, if there apear 5Vdc on pin 12 when you power up your lcd, and dissapears when you power down yor lcd from remote control. If all are ok, there is an defective master inverter board.
Now, on the master inverter board find U1, located betwen connectors CN1 and CN2,...

Re: 42lg3000-za No Picture but got sound

Did you repair that lcd?
Maibe i can help you.
i just fix a master inverte board for 42lg3000 lcd.