Question about LG 50LS4000

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When turning TV on, why does the screen blink on and off?

I changed Tcon board but same problem

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Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Posted on Apr 30, 2015

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Posted on Jan 02, 2017

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1 Answer

70 sharp aquos tv. light blinks five times, two slow


You already have done all the necessary tests. Your LCD Panels Drive board which comes after the T-Con on other side is faulty. You have to replace the LCD Panel itself to fix the problem. The cost of the panel may be more than the price of a new TV Screen.

Feb 02, 2018 | Sharp Televison & Video

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Hi there, my Samsung TV turns on, but the screen is black and the audio works. I changed the main board and power supply/LED board. I'm thinking the T-con board but I just wanted your opinion.


Maegan,
You have already changed power supply/led board and main board. What is left now is the tcon and scaler board. Please try tcon.This may solve your problem. By the way, there is a systematic way of singling out the faulty board. A little research on this will save you save you time and money. Good luck.

Jan 22, 2018 | Samsung Televison & Video

1 Answer

I have a sony bravia kdl46z4100 and is showing 14 blinks in standby mode when turned on. The tv does not turn on. Please help find the part that needs to be replaced. Thanks!


Here is what the service manual says ...14 red flashes- bad TCON or Bad LCD panel, replace tcon board. unplug tcon board if tv stays on without tcon board replace tcon board.

Good luck!

Dec 21, 2017 | Sony Televison & Video

1 Answer

Have a samsung TV UN40H5203AFXZA will not turn on. When plugged in the stand-by light blinks seven times and goes off. Changed power,main and Tcon boards. 3 lights come on the Tcon board but go off.


Please un-plug the cable between the main board & the power supply, apply the AC power to it, if the back lights come on & still on, replace the main board; if the back lights did not come on, mostly the problem is defective back light LED strips.

May 08, 2017 | Samsung Televison & Video

1 Answer

Sony Screen wont turn on. Replaces tcon. No Power going to tcon.


Hi Nick, Please trace the 12V line. Most probably it is coming from the main board.

Dec 10, 2016 | Sony Televison & Video

1 Answer

Sony Bravia KDL-60EX500 no longer turns on.


Refer to Sony KDL 55EX500 Troubleshooting Manual Protection Mode Symptom...
5X Blink - TCON & HFR Failure
The 5X blink protection mode indicates a communications error between the TCON/HFR board and the MT5388 microprocessor on the A-Board.
First replace the TCON/HFR Board if the 5X protection mode blink pattern occurs. If the TCON/HFR Board does not repair the problem then replace the A-Board.

see schematics in Sony KDL 55EX500 Troubleshooting Manual Page 23

Sep 15, 2016 | Sony Bravia Kdl-60ex500 60" Inch 120hz...

1 Answer

I have a Vizio XVT3d474sv. My TCON went bad, only one side of the screen was working. I ordered a new TCON for it. I had been checking over other things and was lightly tapping areas to see if somethi


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Nov 03, 2014 | Vizio XVT3D474SV 47 in. 3D LCD TV

1 Answer

Sony 32" LCD TV KDL-32M3000. No picture, LED will


What does it do if you unhook the flat cables going from the tcon to the panel, does the blinking go away and do you have sound then?

Dec 10, 2017 | Sony KDL-32M3000 32 in. LCD Television

2 Answers

My tv sony bravia 46" are still not workin i still


Don't return the new refurbish tv power supply board,keep it and used it the old one u have it in ur tv it is shorted and dead already.Return those LCD inverter boards though.Should buy a main tv Tuner signal board and replace it too though,that the other board it is causes and it is also dead too.Repair this problems many times before,alway these two boards are dead.I promise u the tv now will have stable power supply again tv will work again.

Jul 15, 2011 | Sony BRAVIA KDL-46W4100 46 in. LCD HDTV

1 Answer

The TV won't turn on, and the standby light is blinking in groups of 5. The manual mentions this, but only that the number of blinks is significant, not in which way. What do we do?


Just a copy from Sony:
5X Blink - TCON & HFR Failure
The 5X blink protection mode indicates a communications error between the TCON/HFR board and the MT5388 microprocessor on the A-Board. First replace the TCON/HFR Board if the 5X protection mode blink pattern occurs. If the TCON/HFR Board does not repair the problem then replace the A-Board.

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Jun 14, 2010 | Sony KDL46EX500 46 in. HD-Ready TV

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