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Chris Broussard Posted on Apr 24, 2017
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I have a Samsung LED TV that has a picture but really dark. Seems like the led driver is out but I can't find out which board the driver is located on. It is model number UM65F7100AFXZA. Thanks!!!

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The Knight

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  • Samsung Master 76,851 Answers
  • Posted on Apr 24, 2017
The Knight
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Joined: Oct 14, 2010
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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.

5 Related Answers

Anonymous

  • 4 Answers
  • Posted on Apr 17, 2009

SOURCE: plasma tv has no picture but green led is on

Try unplugging the TV for a few minutes (discharges the ballast/ps) then plug in and attempt to power on. I have the 42P Vizio over two years old and ran into the same problem a few times. First thought was a power supply issue, but the unplugging trick worked. Good luck.

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Anonymous

  • 51 Answers
  • Posted on Nov 28, 2010

SOURCE: my samsung 55" 3d led 8000 series tv dont seems to

You need a 3D source.

Anonymous

  • 33 Answers
  • Posted on Mar 11, 2011

SOURCE: Samsung 40" LED TV Display

Not familiar with this particular model of samsung LED TV, but ghosting and shadowing are usually an accepted manufacturer's defect.

If you're still under warranty or within 30 days of purchase, contact the company that sold you the TV or Samsung warranty department.

If you're out of warranty and you don't wish to deal with this, contact a TV repair shop. They will most likely tell you that it's not worth repairing and recommend you purchase a new TV.

Anonymous

  • 1 Answer
  • Posted on Mar 18, 2011

SOURCE: trouble locating correct location for tv on/off sensor

i have phoned bose the tv sensor will not work with led tvs becouse they do not transmitt enough power for the sensor to pick it up

Chi Chu

  • 8457 Answers
  • Posted on Jun 11, 2011

SOURCE: Samsung PS42B430 42" Plasma tv. LED flashes and

The tv power supply board have more dead components parts,u just don't have the skills an the know how to trouble shoot find out more dead components parts that all.Try website like Ebay.com to buy a whole refurbish power supply board for the replacement.

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Can bad T-Con board cause Samsung TV to flicker off and on?

I think an LED problem is more likely. The LED strips are usually powered by a driver circuit on the power supply board. You can check this with a bright flashlight shining on the front of the display at about a 20° angle from parallel to the display. If you can see the picture or the menu with the flashlight beam during the "dark" period, the problem is NOT likely to be the T-Con board.

You can also look at the back of the set with the cover removed - most sets have a number of vent holes in the back plate through which the backlight can be seen when it is on. If these holes go dark when the TV goes black, the backlight is being turned off.

When the screen is lit, take a picture quickly and look for dark spots. Maybe one of the LEDs has a partial short that shuts down the LED power and triggers a retry cycle. If so, after a while it will burn out and then the entire LED strip will be inoperative.
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Depends on the model. Have you checked the backlight, (LED in this set perhaps).
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If you see a picture with the flashlight you can rule out the T-Con board. It's working. So the led driver board is the problem. TV Parts Universal TV Stands DLP Chips ShopJimmy Go here for replacement parts.
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Tv flashes good picture for 1/2 second and then dark. Picture is there but really dark. How can I tell if it is an led strip or the power supply board

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://electro-medical.blogspot.com/
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.
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Lg led tv has sound but no picture

suspect either a back light power board issue or main power board to back light board issue...also, is it under warranty ?
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