Question about Samsung LN-T4042H 40 in. LCD HDTV

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Samsung lnt4042hx/xaa 40in lcd tv wont turn on

I have a samsung lnt4042hx/xaa 40in lcd tv and for a while it was, what i think ppl call, cycling. making clicking noises and taking a long time to turn on until it finally did. now it wont turn on at all just clicks once but nothing happens. ideas before i take it in?

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  • Misfat138 Apr 21, 2009

    My Flatscreen is doing this Cycling thing, it's when i try to turn it on it clicks several times like its trying to turn. Eventually it turns on but im sure one of these times its not going to.

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I concur with Lightnbaby.... had same problem... my TV LNT4042HX/XAA took 10 min to start sometimes... the capacitors on the power supply board had bubbles on top 4 of them all 10/1000Uf. Samsung wanted to charge $220+ to have a guy come out and fix. J&J parts (samsung vendor) wanted $108 for a new board. I replaced the 4 capacitors for $4.68 and the TV works fine now!!!!!

Posted on Mar 29, 2010

  • Pattym782 Aug 30, 2010

    Can you tell me what size capacitors you used to replace old ones? I have the same tv model and need to replace them as well for the same problem...

  • jon15872 Nov 28, 2010

    I have the same model with the same clicking issue. where do you buy the capacitors at and is there any diagrams showing how to replace them?

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Aloha! Justin
many lcd tv have problems on powersupply 5vdc out.
open up backcover
check powersupply. look for capacitors that pop open on top
repalce All same capacitor look good or not.

Posted on Apr 14, 2009

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Just an FYI: I called and Samsung is sending a repair tech out to replace the Power Supply for free as part of a Class Action lawsuit:

http://www.samsung.com/us/capacitorsettlement/

Posted on Nov 23, 2012

  • Rick Simonis Jul 07, 2013

    Fantastic-my TV was in the settlement group. Supposed to be fixed for free. Thank You!

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My Solution is to never buy a SAMSUNG TV again. They're and always have problems.

Posted on Oct 27, 2009

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If tv under warranty then call samsung

Posted on Sep 03, 2015

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Samsung lnt4042hx/xaa 40in lcd tv wont turn on? This trouble maybe power supply or inverter boards is defective.
first you can test the voltage of the multr,and then check which part is defective.From Wisiny.com can find those parts
if you have any question,please let us know email:service@wisiny.com.thanks,we sincerely hope we can help you!
you can also check this boards whether suit you:
IP 45130A Samsung BN44 00127F Power Supply Backlight Inverter

Posted on Feb 02, 2015

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Posted on Jan 02, 2017

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