LG 37LV3500 No Picture, Backlights working

[neilc6]

Found a scorch mark on the tcon shield and burnt out IC on the Tcon.

Screen has a 1 pixel vertical blue line at left edge and splotchy screen at an angle (like it wasn't cleaned well underneath the panel).

Unplugged LVDS cable and blue line goes away so looks like it is from Tcon and not panel. Splotchiness not that visible when viewing directly from the front and probably not too visible with an image.

Replacement Tcon boards are around $30 USD.

[Andrew F. Ali]

Re: LG 37LV3500 No Picture, Backlights working

When you replace the T-CON Bd. the blotchy screen should clear up.

[budm]

Re: LG 37LV3500 No Picture, Backlights working

I think what you are going find out is that the panel is bad and caused the IC to burn up.
The blue line went away when removing the LVDS cable due to no more 12V to run the T-CON.

[neilc6]

Re: LG 37LV3500 No Picture, Backlights working

Any other opinions/experiences? The ebay seller cancelled my tcon board order. Can't find any exact part matches on ebay. There seem to be several different versions of this tcon - shopjimmy says mine is 2484B stamped on the board.

[nomoresonys]

Re: LG 37LV3500 No Picture, Backlights working

If you had a spare IC you could replace it, then if it cooked the replaced IC, would be a very good bet for bad panel, don't know if there's a way to test the panel.

[neilc6]

Re: LG 37LV3500 No Picture, Backlights working

I found a board on Aliexpress for $8. Picture showed 2484B and got a 2484C with extra connector. Plugged it in and got half a screen. Checked the tcon ribbon on the bad side and the connector is melted where it attaches to the flex circuit. Should have done a better inspection. Would have been a good find. Was a nice thin TV.

Edit add: Tearing it apart, lots of damage on the left side flex. Looks like a coffee was dumped on that part of the screen. TV is edge-lit hence the thinness.

[budm]

Re: LG 37LV3500 No Picture, Backlights working

Thanks for the follow-up.