Re: LG 50PG100R 50" Plasma TV no picture but sound

So, does that mean that the Control board is damaged? Or is there a chance that a defective Y-Sus board could cause those issues?

Re: LG 50PG100R 50" Plasma TV no picture but sound

I finally found some time to measure the testpoints, and while doing so, i thought i might aswell measure the connector connecting Y-Sus and X-Sus.
So, here are all measurements, taken between Chassis to Pin (/Test point):

Control board to Y-Sus (flat flex):
Pin 1: 0.61V (3.2V)
Pin 2: 2.93V (0.76V)
Pin 3: 1.43V (0V)
Pin 4: 0V (3V)
Pin 5: 0V (0.6V)
Pin 6: 2.4V - 2.6V (0V)
Pin 7: 0V (2V)
Pin 8: 0.11V (1.2V)...

Re: LG 50PG100R 50" Plasma TV no picture but sound

I actually did disconnect the LVDS Cable when testing with the auto-gen jumpered. I can't remember the image being different after doing so, but i can test again (i'm not totally certain it didn't change). When connecting the jumper while the TV is on, the display gets a little brighter for a short moment, but then changes back to dark- gray.
(Just out of curiousity, what frequency and voltage ranges could be expected for the data signals?)

The training manual mentioned test points (& expected voltages...

Re: LG 50PG100R 50" Plasma TV no picture but sound

Well, definitely a lot of stuff to measure described in the PDF.
Until now i measured all test points in diode mode described on pages 63 - 86, but everything is like in the tables on those sides, except for the data pin on the upper Y-Buffer board, which should measure .78V in diode mode, but my DMM measures it as open.
I also measured some of the test points on the Control board, but they all seem to be fine.
Sadly, I don't own a oscilloscope, so i cannot test for the waveforms described.

...

Re: LG 50PG100R 50" Plasma TV no picture but sound

right, forgot to include this:
when connecting either the top or the bottom Y-Buffer board, the top (respectively bottom) half of the screen stays completely black while the other half stays lit up a little.
I don't know if its worth mentioning, but when turning on the TV, only one of the four LEDs on the control board turns on (might be some sort of error code?)....

First off, thanks for all help or advice you can provide me.

So, I'm having a problem with my LG- TV, to be exact a 50PG100R.
One day, while watching TV, the display just turned black.
Sound still works fine and power led does what it's supposed to do (so the TV isn't just turning off).
Display lights up a little bit, like a the backlight turned on (can't show with a photo, because camera somehow isn't picking the light up) and the pixels look like they are lit up a tiny bit.
After around two seconds, the display changes to a darker color, but is still...

Re: New Members - please post your introductions here

Hello from Germany (too),
found this forum while searching for a solution for fixing my TV, and since i wasn't successfull, i now created an account hoping that i could find some help here.

Chis