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Samsung lcd tv screen went black. still has sound and the backlight is working. was goin to replace the t con board but I'm afraid it could be something else. Anybody have any way to tell for sure?

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  • Samsung Master
  • 74,383 Answers

Check and replace the T'Con board. If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Posted on May 14, 2017

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Posted on Jan 02, 2017

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  • 718 Answers

SOURCE: how hard it is to replace by yourself main board Samsung LN-T4065

You need to do some more diagnosing of the problem. If you get sound and change channels take a bright flashlight and place it again the screen. Look for an image around the edge of the flashlight.
If you see an image that means the LCD controller board (TCON) is probably good.

The problem is probably one of three causes;
1) Inverter board is bad
2) CCFT (cold cathode fluorescent light) are bad.
3) Power to the inverter board is bad. You can also check the connectors.

Posted on Mar 30, 2009

eddiepeezy
  • 130 Answers

SOURCE: I have a 4yr old

It sounds like it may be the voltage inverter to me.

Posted on Feb 04, 2010

  • 11800 Answers

SOURCE: Hi, my Samsung 40" LCD TV's

Actually no board/part is defective - you have a bad contact that when the tv heats up it fails. Since the screen goes totally black but not light goes out on the tv and the sound still goes on then the problem is in the mainboard or the connection between the mainboard and the t-con board - a wide flat cable.
You must open the tv and reseat the connecting cables. If this doesn't fix it then the problem is in a soldering: you will have to remove the boards and check by eye every single soldering - redo all that look suspicious; you will probably have to move the components with your fingers to clearly see a bad soldering in their pins.

Posted on Nov 02, 2010

welcomejee
  • 10594 Answers

SOURCE: I have a Samsung Ln32A450c1d

Hi,
Basically it is problem of LCD Panel (screen) however some times T-Con board replacement fixed the issue (T-Con board is part of lcd panel but some part shop sell it separately). Main board is not related with this kind of problem.
Required T-Con board is available in ShopJimmy.com (click the link to view available boards)
If T-Con board replacement does not solve half screen vertical lines problem then LCD Panel will be replaced and it would cost approx new tv price.
Hope this info will help.
Thanks.

Posted on Mar 28, 2011

emissionwiz
  • 76682 Answers

SOURCE: Hitachi 32LD8D20UA LCD TV, No Picture, Sound and Backlight Working

Replace the TV, the new ones are cheaper than repairing this one.

Posted on Feb 22, 2012

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Sanyo DP46142 TV comes on for approximately 30 seconds and then screen goes black. Power LED stays on.


Sounds like a backlight problem to me. If you input a signal to the HDMI or Composite input and then it goes black have you tried taking a flashlight to the screen to see if the picture is still there but just dark? That would indicate a backlight issue. That model appears to be an LED edge lit backlight, so if the picture is still there after going black your going to have to trace out the backlight circuit and see whats going on. Usually with LED backlighting if it comes on at all then the LED's are good, its just the driver supply thats failing to keep them on. Some TV's have a small separate board that provides the backlight control, but i suspect with this model its on the power supply board and not the motherboard. Have you checked that board? It could be bad caps on the power supply board, check the voltages to the backlighting when it lights up and then when it goes dark. It could just be some failed capacitors on the power supply causing that voltage rail to drop off.

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Samsung LCD TV, no picture, but sound and backlights work. Not t-con board. Any ideas what it could be?


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. Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

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Good day..

that problem is cause of bad inverter board or T-con board..

If you have backlight the problem is T-con board..if no back light the problem is inverter board..

Hope it helps..

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Had the LCD TV For 5 Years, no problems, then just before going to bed i was about to turn off the tv when the screen went black but sound was fine. I switched channels and you could hear the channels...


Your problem can be related to either LCD backlight inverter failure or T-con board failure. Please turn on your tv, darken the room and see if you notice a dull glow on the screen. If you see a dull glow then backlight is functional and the t-con is dead. Otherwise it can be a backlight inverter failure(in some cases the backlight itself). In that case I would try replacing the backlight inverter board and hope its not the backlight as the backlight is embedded into the the panel and the only way to replace it is to replace the panel.

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