LG 55" LED screen flashing on and off. Sound works. Replaced T-con board and Main board. No help. Any ideas of what to try next?

SOURCE: No picture or sound with a red flashing power light. Have replaced the convergence IC's but no change (do not have the chirpint sound). Removed main power board & green LED does not light up

On that model the conv IC is usually not the solution. I believe its the blown capacitor problem with is an easy fix. Check the site www.TvRepairKits.com for a repair kit.

SOURCE: sharp Lc-26sb24u white screen with sound

You will get a white screen when you unplug the t-con from the main board. Doing so removes power to the LCD panel. Verify that all of your voltages from the power supply are correct. If they are, I'd look at the t-con board. It sounds like there is a problem with the t-con that is pulling down the main board.

francoise cleofas

• 2432 Answers
• Posted on Oct 03, 2012

SOURCE: lg philips main board, ive just replaced this board as old board was stuck in service mode flashing red blue green screen, ive connected this new board an now have sound but no picture. t-con board te

does the screen totally black or with only white screen?. recheck all the connections going to t-con board and x board which you missed.

The Knight

• 76851 Answers
• Posted on Jan 18, 2014

SOURCE: How does a T-con Board works?

It is difficult to type in all here by this window, as it is too much. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

Joe Stanch

• 755 Answers
• Posted on Dec 02, 2014

SOURCE: I have a LG 42LE5300 Led tv when I turn the tv on

if you are getting the logo and snow , I think you are on the wrong channel for programming