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I have a Samsung LCD tv model#LN46A630M1FA picture was dark changed power supply board picture now goes from dark to light any answers

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Posted on Jan 02, 2017

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SOURCE: Power Supply Board for SAMSUNG 40" LCD TV Model LA40R81BX

You'll find some Samsung power supply boards here : http://www.usefulparts.com/index.php?main_page=index&manufacturers_id=11&sort=20a&filter_id=98&alpha_filter_id=0
but you have to open your TV first and find out model number

Posted on May 10, 2010

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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.

May 04, 2017 | Sanyo Televison & Video

2 Answers

Why does my TCL tv stay dimmed and very dark screen? I've reset it and everything?


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.

Apr 30, 2017 | Televison & Video

1 Answer

Regarding Samsung LCD TV LN37A550P3FXZA. On 4/9/17 picture became too dark, looking like brightness setting is way too low and color saturation too high -- I'll call this the "Too Dark Picture."


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.

Apr 10, 2017 | Samsung Televison & Video

1 Answer

Got a Samsung smart TV un40f6300afxza has a dark picture everything else works fine what can it be?


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..

Dec 06, 2016 | Samsung UN40F6300AFXZA - UN40F6300AF 40...

1 Answer

Samsung LED tv


The power supply board probably needs to be replaced. Sounds like a loose solder joint on the board

Jul 05, 2016 | Samsung Televison & Video

2 Answers

Hi, I have a samsung flat panel tv model UN29F4000, has sound and looks like no picture but if looked at in the dark you can see a faint image. Powersupply board changed with same results. Thanks


Looks like the back lights are not working. The older TV sets had fluorescent tubes, the newer have LED's voor back lighting. I would look there, or visit a repair shop. Or when the TV is old, start saving up for a new one.

Apr 18, 2015 | Samsung Televison & Video

1 Answer

Samsung LN26A450 screen won't work


Your model Samsung falls under a class actions settlement. These units have defective power supply boards and Samsung has agreed to pay for the repair / replacement of the boards at no cost to the user even if the unit is out of standard warranty. This sounds like the issue with your TV. Here is a link with additional information about the settlement and how to get the warranty work completed.

http://www.ccl-la.com/blog/index.php/samsung-has-reached-a-settlement-in-class-action-lawsuit-over-faulty-tv-power-supplies/

Sep 09, 2012 | Samsung LN26A450C LCD TV

1 Answer

I am looking for A repair manual for a samsung LCD tv LNT5265f


No need for manual or will find one because the tv corporation don't release them.Go to Shopjimmy.com,Ebay.com.Type in tv model Samsung LNT5265F power supply board and compair picture to ur tv power supply board.Ask questions to sellers.Buy it,and replace it.

Mar 05, 2010 | Samsung LNT5265F 52 in. LCD HDTV

3 Answers

I have a Samsung LN40A450 LCD TV that is only a year and a half old. I am getting no power to the tv only a consistent blinking red light and a audible clicking/beeping noise. What needs to be replaced?




I will explain how to:


  • Open the case of the LCD
basically in all LCD monitors have two circuit boards (power supply board and system board)
  • After you open you will see the two boards are

  • You see a board that has a socket for the power source. wrote that the board we're looking for (power supply board)
  • Remove all cables connected to the board and take out the board. (get noted before you unplug it)
  • Now you see it components on board, we looking for capacitor.(see picture below)
46ddc22.jpg

  • Looking for damaged capacitors, physically you will see a capacitor on the top like a bloated (see picture below)
7a91ba9.jpg
  • Replace the damaged capacitor with the same value that you can see on the surface of the capacitor. (In this step you need any soldering tool)
My advice: replace capacitors with higher voltage, like 10V replace with 16V or 25V will be fine.

Feb 01, 2010 | Samsung LN40A450 LCD TV

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