LG 42ld520 Main Board issues

[Smoothjazz]

Been troubleshooting this LG tv set this morning.I get the LG startup screen..with no clock.. the screen suddenly goes away with only the back light
lit up.Took DC voltages on the main power supply board which has the connection going to the main board and I am missing a couple 20VDC readings which
is suppose to be on certain pins coming from the power supply board. Has anyone came across schematics for these power supply boards to try to troubleshoot
voltages? The board has markings on what voltages are suppose to be at certain points.

[budm]

Re: LG 42ld520 Main Board issues

We need pictures of the whole back side of the TV showing all the board.
We also need the Voltage reading of the connector on the power supply board end that goes to the main board when TV is OFF and when TV is turned on, you MUST out down the pin name for each pin and follow by the Voltage readings for each pin.

[Smoothjazz]

Re: LG 42ld520 Main Board issues

Will do