Question about Samsung LN46C750 46 in 3D LCD TV

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My Samsung LN46C750 has developed horizontal black lines across the screen.

I have removed the back panel and checked for any obvious issues including any scorching around resistors or bulging in capacitors. I see no visible problems with any of the boards including the power supply board. May pull off the filter capacitors and check them with a multimeter if nobody has any better suggestions. In all of my other electronic fixes when capacitors were bad it was obvious, but here they look fine. Would rather not desolder the capacitors if they are not the problem :P Any ideas?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

roety
  • 585 Answers

SOURCE: Samsung LNS4041DX/XAA White horizontal lines

Hi my name is Roety,
I can help you with your issue ,
If the lines are present on every input you most likely have a bad screen. We usually replace the mainboard first because its cheaper .
Check part prices at encompass.com login as a guest
 
 
If I have helped you with your issue please click accept.
If you have more questions you can still respond until this post expires,
I will reply asap
Thanks

Posted on Dec 01, 2009

  • 1 Answer

SOURCE: Samsung HPR4252 with red horizontal lines accross the screen

I just had my HP-R4252 repaired on 12.05.09 with a similar problem. The picture is covered in horizonal, broken lines and the color is predominately red. They lines are grouped together in large bands across the screen.

The tech replaced the Y-Buffer boards (Up) and (Low) in about 20 minutes.

Samsung BN96-02034A BOARD, Y BUFFER UPPER ASSY
Samsung BN96-02216A BOARD, Y LOWER BUFFER ASSY

Posted on Dec 06, 2009

dave1645
  • 834 Answers

SOURCE: LNT4061F LCD TV Picture Problems

yes it can, but i would lean more to a bad T-con or control board the board is around a hunderd dollars from Samsung on the web or Andrews Electronics on the web

Posted on Dec 07, 2009

  • 927 Answers

SOURCE: Which Replacement Power Board for LNT4665F Samsung LCD TV?

Howdy,
It would be a lot cheaper if you just replace the two caps that have gone bad. Just get a cheap solder pencil from the store and about an inch of solder and you are in business.
The Power Supply Board is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.

Thaks for using FIXYA, BIG IRISH.

Posted on Jan 02, 2010

  • 8457 Answers

SOURCE: We have Samsung LCD model LN26A450C1D, which is

The tv Tuner board is dead,that the board,where the brocasting incomming signal cable connected into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner board for the replacement.

Posted on Jul 22, 2010

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I can help you with your issue ,
If the lines are present on every input you most likely have a bad screen. We usually replace the mainboard first because its cheaper .
Check part prices at encompass.com login as a guest
 
 
If I have helped you with your issue please click accept.
If you have more questions you can still respond until this post expires,
I will reply asap
Thanks

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