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Samsung LCD HDTV LNS4041DX-XAA Model - 40 inch screen

We are having the same exact problem with this exact same TV. Doesanyone have a solution for it? We've had it less than two years. Needless to say, if we have to purchase another TV (especially in thiseconomy), we will not be buying a Samsung.

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Samsung LCD HDTV - Color Problems

voltage adjustment for y-sus board or power supply

Posted on Mar 17, 2008

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SOURCE: Samsung LCD TV HCP4363WX/XAA Black screen no sound.

check out the link below ... sounds like a similar problem:
http://www.dslreports.com/forum/r20889230-Samsung-LCD-TV-No-Picture-but-has-Sound

Posted on Sep 06, 2008

  • 1 Answer

SOURCE: Samsung 40" LCD HDTV #LNS4041DX/X

I the same problem and I found that the Capacitors used on the power supply portion of the circuit board were leaking and/or bulging. These parts were failing and as a result the problem worsened with time. If you are able to remove and solder new parts on to the circuit board follow the following procedures. Or get a technician to do the repairs.

1) Make note of connections at back of TV.

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2) Unplug power cord and other connectors from back of TV.
3) Remove back of TV with a Phillips (+) star shaped screw driver.
4) Note the position of all connections to the main board.

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5) Remove circuit board taking care not to damage any of the components.
6) Locate parts CM806, 811, 812 & 817, all 1000 uf 10v capacitors.

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7) Remove and replace parts with capacitors of equal physical size that are (1000 uf ). I would recommend a voltage rating of 25v or 32v. Note that the voltage refers to the amount of voltage the capacitor can handle. The higher the better.

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8) Reinstall and reconnect the circuit board.
9) Replace back on TV and setup the unit as before and you’re done.
10) Enjoy!

I replaced the parts for just under $10.00.

Posted on Apr 27, 2009

tvtek
  • 1284 Answers

SOURCE: White dots on screen of 50 Samsung DLP

Random dots or pixels failing on a DLP TV will be a bad DMD chip. This is a technician replace item only. The chip runs around 160 dollars list price. The part number will depend on which version the set uses and will be determined by the technician.

Posted on Jul 23, 2009

tvtek
  • 1284 Answers

SOURCE: Own a Samsung DLP TV 42 inch and white dots have

The random whit dots you are seeing is more than not the DMD or million little mirrors board. The white spots represent some of the mirrors that are sticking in the on position. In that case they are always reflecting white light from the lamp. I don't concider the DMD board a do it yourself repair since on the older DLP set it requires mechanical alignment as well. The best thing to do is contact a techincian and see what they might charge to repair the TV for you. Please take a few moments to rate my answer...Thanks..

Posted on Nov 22, 2009

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The problem is 4 capacitors on the power supply board. Just had mine done under warranty. They (Sears) replaced the whole power board but you can get larger capacitors and just replace those for alot cheaper if not under warranty.

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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

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Howdy,
It sounds like you have a Power Supply Board problem. The PSB 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.

Thanks for using FIXYA, big IRISH.

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Yes, you do need to get the LCD repair before the warranty expires. Call the manufacturers to find an authorized service center near you.
Good Luck.

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Same problem with my set. The volume was either fully up, or fully down (usually down), and other controls didn't work- like I couldn't access the menus and could not adjust the width of the screen/aspect ratio.

I lived with it for about six weeks, then took the back off the TV. Just now it seems to be fixed, but I don't know if it will last.

I disconnected the wire leading to the channel up/down, volume up/down and source board, turned on the tv, turned it back off, reconnected the cable, and everything seems fine now.

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