Re: HELP!!! LG 50PN4500 plasma. Voltage issue.

I'm not sure if the image is going to post. But the ysus is good. It is brand new. I replaced it before I did any voltage testing. The pin from the xsus that is supposed to carry +17v to the ysus is only putting out 3 volts. And there is a jumper further down the zsus that is labeled 18v that only puts out 3. And I know there isn't a problem with the power supply board because all voltages leaving the power supply are perfect....

I am having an issue with z sustain board. The T.V. doesn't want to turn on. I tracked it down to a problem with the z sustain board but I am having issues finding which component is bad.

The high voltage going from z to y is good but there is 17 volts that goes to y that only reads 3 volts. I have pulled all electrolytic and all brown film capacitors and tested them with a capacitance meter. And all are well within tolerances.

Any ideas on where to go now? I would much rather replace a component than replace the whole board....

Re: LG 50PN4500 Power on issue

Please let me know if you find the schematic. I have the exact same issue with the same T.V.