LG 42LG60 Manual page 27

Power Supply PWB Test (1 ST Test All But Backlights)
Power Supply PWB Test (1 ST Test All But Backlights)
P2 Connector disconnected from the Main PWB
AC: Not applied when adding jumpers. Applied when making test.
The Power Supply "MUST" be producing STAND-BY +5V and AC Det.
(1) Short either pin 9, 10, 11 or 12 (5V) to Pin 19 (PWR) using a 10K resistor.
(2) Apply AC to the PWB.
This turns on the power supply except for the Ballast Section.
Check the following:
Pins 1 and 2 for +16V
Pins 5 and 6 for +12V
LCD DV 42LG60
27