Question about Samsung LN-T4042H 40 in. LCD HDTV

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My ln-t4042h turns on and stays on for a while and then the screen goes blank then coming back on and off then stays blank. Also while it is actually working you can see the brightness fading in and out.

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  • Samsung Master
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U have sound,after picture fated?Ur LCD inverter board it dead.must replaced this board to get the picture back.It usally a long board.Tries Shopjimmy.com,Ebay.com for the board part.

Posted on Feb 06, 2010

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I have a samsung LN-T4042H, and one day it just randomly turned off. Now if i try to turn it on, it gives me this flicking sound. I think it might be the capacitor, any advice?


This model has a history of bad electrolytic capacitors on the power supply board. I would definately start by looking at all of them. If any of them are bulged or domed on top rather than flat, then you should replace them. Just make sure you put them back in w/ the positive and negative sides in the correct position. Good luck!

Sep 03, 2010 | Samsung LN-T4042H 40 in. LCD HDTV

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My Samsung TV Model # LN-T4042H turns on after numerous attemps.


you would get a email notification..... please follow the link... log back into your account.... click on "my Profile" link to the top right of the screen after you logged back in..... then you can click on the chat you had with me and you can see the chat transcript

Aug 15, 2010 | Televison & Video

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Samsung LN-T-4042H the picture is flashing. How


Look for screen setup for AUTO ASPECT in the setup menu, turn it OFF.

Nov 07, 2009 | Samsung LN-T4042H 40 in. LCD HDTV

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When I try to turn on my Samsung LN-T4042H LCD HDTV it is now constantly clicking in a continuous loop and will not immediately turn on. It started out small- a few clicks yesterday morning. Today it...


There is a problem with the power supply in your TV. The regulator switch is causing teh clicking sound you hear. In order to fix it, you will need to replace the power supply. This is done by taking off the back cover of the TV, locating the power supply which is usually a yellow board that will have many high voltage capicators on it and replacing it with a new one.

Nov 06, 2009 | Samsung LN-T4042H 40 in. LCD HDTV

1 Answer

Samsung LN-T4042h to PS3 "Not Supported Mode"


i fixed it, on the PS3 u hold the power Button while holding then Switch the power button on on the back for like 10 sec and it resets the picture settings to default

Oct 24, 2009 | Samsung LN-T4042H 40 in. LCD HDTV

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Clicks on and off several times before staying on


The power supply will sense if the set is 'drawing' too much current and switch itself off. This could be the case here. The power supply board may eventually go completely bad.

Feb 23, 2009 | Samsung LN-T4042H 40 in. LCD HDTV

1 Answer

Samsung LN-T4042H 40" LCD


This may not really be a solution to your problem, but here it goes. If you are not sitting a particular distance from your tv you will experience slight pixelation. I have this tv myself and I think it looks great. Now when I am sitting up close on a station that is broadcasting in 720p(which is pretty much every HD station) It looks only pretty good...I sit back and it is fantastic. The good rule of thumb is take the number or inches your TV is in yours and my case 40, divide by 10 and then multiply by 2...and that is the number of feet you should be for optimal viewing distance. So 8 feet, you would be surprised to see how sitting this magic number away makes a difference.

Feb 01, 2008 | Samsung LN-T4042H 40 in. LCD HDTV

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