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I have replaced the main video board but still am getting a picture or sound. What can I do next?

Replaced the main video board

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  • Televison & ... Master
  • 15,950 Answers

What is the make and model? Your post says that you ARE getting picture and sound. What was the original problem? What lights work on the unit?

Posted on Dec 13, 2014

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6 Suggested Answers

6ya6ya
  • 2 Answers

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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

circuitworld
  • 335 Answers

SOURCE: sound but no video HPT5054 Samsung

One of your transformers on the inverter board are failing to sustain regulated power to the florescent lamps resulting in a dark picture. Also check the SMD fuses on the inverter board(s) see if they have blown. You will need a continuity meter to check them. You can get one from radio shack and be sure to get one with audible sound....you don't have to replace boards when you can fix them.

Posted on Jul 10, 2009

toddthetvmd
  • 101 Answers

SOURCE: i have picture but no sound on my 42 inch vizio

If you received a remanufactured board it might be defective,Or did you forget to hook back up the speakers? Sounds dumb but happens alot. Speaker wires get in the way,we disconnect them to look at a board or replace one.Often gets over looked.But I have received several defective boards.Hope this helps. Toddthetvmd

Posted on Oct 26, 2009

rylee_smith
  • 8619 Answers

SOURCE: model #50PC1DRA no picture but

Hi


Thanks for using FixYa. As you have already replaced the Z-sus and the main logic board then the issue seems to be with the Y-main and/or Y-sus board. You’ll need to take the back off and check for any blown/bulged capacitors that might have gone bad and causing this issue. Please do accept the solution if the issue is resolved or post a comment for further assistance.


Thanks
Rylee

Posted on Aug 02, 2010

ladywinn
  • 5138 Answers

SOURCE: Hi, I'm getting sound and no picture. I can

I read alittle about your problem and the T-Con Board is located in the Middle up on Top of other Boards It controls the color/ Video on TV,Since you hve No Picture? ,When you said you replaced Main Board was it the Signal Board? Shopjimmy.com has a few boards .
Encompass Parts Distribution List this Model/Parts 1-800-638-3328

Posted on Dec 13, 2010

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Picture went out on 2-year-old Samsung TV model UN50EH5000F. I have sound and full backlight but no video.


You have replaced everything that could have gone wrong - except for the video Screen itself. Check the connections (ribbon) to the screen for oxidation - use eraser to clean.

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Either you have a bad panel or the T-con board is not processing the video to the screen. This is the board between the main board and the screen. There is one on E-bay for just under $35.00. Hope this Helps.:)

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I have a 55 in Samsung smart TV I have just replaced the tcon board but the issue is I have sound but no picture of I use a flashlight I can see the picture clear not sure what board to try next


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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Fault at its main digital board. Back light control voltage from it is absent. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

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2 Answers

I have a Samsung TV model UN50H6350AFXZA which has sound but no picture. Backlights work. Replaced t-con board with new one, but not fixed. What next?


Main board. T con board is only involved with video issues. Main board goes both ways and since you already replaced the T con board that is your only alternative. U got backlite so inverter board is good.

Nov 13, 2015 | Samsung Televison & Video

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No back-light,No picture, but has sounds. How can I fix it?


Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. 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.

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Flat panel TV


Replacing the tcon board or main board depending on the tv. It's rare but also possible the display panel had gone out.

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To fix no video Vizio E470i-A0 TV


Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. 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/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

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Sound but no picture on hitachi 42hxt12u


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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