Dignity LED TV 156EHD01 - no image, blacklight on and sound

[Folxs]

I got Dignity LED TV 156EHD01, that have a backlight and owner says that the sound is OK.

My 1st thought was "there arent 5V power line" but all power lines are correct.

When LCD screen is 90 angle to me it look white, but when angle comes more sharp - I can see like right part of LCD is different from the left - it could be physical damage to LCD / LVDS etc.

Or GPU is dead or EEPROM / FLASH could be also wrong?

Maybe someone had simillar problem?

[dick_barton]

Re: Dignity LED TV 156EHD01 - no image, blacklight on and sound

Is the Tcon integrated with the panel?

[Folxs]

Re: Dignity LED TV 156EHD01 - no image, blacklight on and sound

Yes - this is typical LCD panel like in a Laptop ( this is LG 15.6" panel)

[dick_barton]

Re: Dignity LED TV 156EHD01 - no image, blacklight on and sound

I think all you can do is use an oscilloscope to check you have LVDS signals and also if you have a supply voltage on the integrated Tcon.

[Folxs]

Re: Dignity LED TV 156EHD01 - no image, blacklight on and sound

I don't have oscilloscope :/ (but if I would have - what signals should I measure?)
If the backlight is working is it possible that T-con don't have supply voltage?

[dick_barton]

Re: Dignity LED TV 156EHD01 - no image, blacklight on and sound

The LVDS signal is quite small about 1V max I think but you should be able to see a change in it if you select menu/exit, menu/exit,........

You do need to see if you have a voltage on the board where the Tcon cable connects to, that slim long panel which is connected to the LCD panel.