lg 42lg5000 no screen power or sound

[adamp91gvm]

Hi have a lg with no back light or sound a board voltages seem low I'm getting a really faint 3 flashing light on the front then it goes blue but that's really really faint this is the power board

[anotherdude]

Re: lg 42lg5000 no screen power or sound

how do you know there is no sound if the screen isn't visible and the correct input isn't selected?

[adamp91gvm]

Re: lg 42lg5000 no screen power or sound

I'm getting from here from the 12v I'm getting 0.9v and from the 16.5v nothing

[adamp91gvm]

Re: lg 42lg5000 no screen power or sound

Tried plugging hdmi in then goin trough source and all buttons

[adamp91gvm]

Re: lg 42lg5000 no screen power or sound

If I disconnect the y main my power goes up to right voltage so I think it's drawing the power

[anotherdude]

Re: lg 42lg5000 no screen power or sound

have you checked voltages going to the main board?

[adamp91gvm]

Re: lg 42lg5000 no screen power or sound

Yer I think I have sussed it y sustain is goosed ordered a new one

[tom66]

Re: lg 42lg5000 no screen power or sound

This TV does not use a Y-sustain board. It's an LCD.

[adamp91gvm]

Re: lg 42lg5000 no screen power or sound

Lol well the invertor board the main one

[tom66]

Re: lg 42lg5000 no screen power or sound

How did you determine that to be at fault?

[adamp91gvm]

Re: lg 42lg5000 no screen power or sound

By unplugging things one by 1 then checking the voltage when I plugged that invertor in it was taking the voltage to the A board from 16.5v to 0.9v

[tom66]

Re: lg 42lg5000 no screen power or sound

That COULD indicate a short circuit. Did you also check the 24V?

[adamp91gvm]

Re: lg 42lg5000 no screen power or sound

Yer it was getting 0v with the invertor in 24 with it out

[tom66]

Re: lg 42lg5000 no screen power or sound

Good troubleshooting, would seem to indicate that is at fault.
Did you ever get time to troubleshoot 58"? Did you find that fuse blown or not?

[selldoor]

Re: lg 42lg5000 no screen power or sound

cCheck for bent pins in the connector - post pic of inverter board.

[adamp91gvm]

Re: lg 42lg5000 no screen power or sound

The 58 inch is a sore subject ha ha it's still sat there I have 50 inch with exactly the same problem no picture at all seems there is no power getting to the bottom of the board I'm looking for a new board for it but can not find one any where I'm goin to have a good look at the board this week