42" LG Plasma won't turn on

[dskall]

Re: 42" LG Plasma won't turn on

You don't have pic of power board. You should have a va and a vs test point on power board voltages should match the sticker voltages on the panel looks like upper left corner of panel. Sorry I can't get your pictures to load so can't see close up.

[dskall]

Re: 42" LG Plasma won't turn on

If you don't hear a click then you should not have these voltages as I believe they are the last to power on ysus and zsus or whatever lg calls those boards. If you have those voltages then I think tv has powered on. I would check y and z boards for an open. If you don't have those voltages. I would look at mainboard or button problem not giving command to the pson pin on power board.

[neutron561]

Re: 42" LG Plasma won't turn on

If you don't hear a click then you should not have these voltages as I believe they are the last to power on ysus and zsus or whatever lg calls those boards. If you have those voltages then I think tv has powered on. I would check y and z boards for an open. If you don't have those voltages. I would look at mainboard or button problem not giving command to the pson pin on power board.

I do have 55 vdc on the VATP and 205 vdc on the VSTP. I don't see a relay on any board.

[dskall]

Re: 42" LG Plasma won't turn on

Those voltages power the sus boards and usually won't come on if there is a problem. They need to match the voltages on the sticker upper left corner of panel. If your sus boards were shorted you won't have those voltages. Does green light flash once a second? I haven't seen the inside of an LG but most have fuses on sus boards.

[dskall]

Re: 42" LG Plasma won't turn on

OK, what you can try and do is jumper the two holes marked EXT AUTO GEN on this board:
https://www.badcaps.net/forum/attachm...1&d=1421777971

And disconnect LVDS (right most ribbon connector)

Then plug TV into mains power.

Do you get a sequence of test patterns appearing on the screen?
I copied this from tom66 you might try and see if you get something on the screen.

[neutron561]

Re: 42" LG Plasma won't turn on

Thanks for the help guys. Set going to e-waste recycling tomorrow.