Tip & How-To about Samsung LN40B550K1FXZA - 40in Lcd Tv 1080p 70k:1

Replace Touch Function IR Board

I show how to replace an IR Touch Function Board on a Samsung 40in TV.

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1 Answer

samsung tv flickering ln40a500


Defective capacitors on power supply board. Replace capacitors or power supply board.

Sep 15, 2015 | Samsung Televison & Video

1 Answer

samsung tv troubleshooting


Suspects its main digital board. But, before a replacement, contact any service technician, and make it sure. This board cannot be replace by the user, as, there might be a software update necessary after replacement.

May 28, 2013 | Samsung 40IN LCD 1920X1080 30001 400UX2...

1 Answer

samsung 40in tv


either the control panel board or the main board has a problem.probably channel change botton on control panel is stuck or shorted.

Dec 28, 2009 | Samsung LN-S4041D 40 in. LCD HDTV

1 Answer

samsung lns4051d 40in has horizontal lines across screen and additional "fuzzies" on hd channels


This sound likes the incoming signal is week. You should play a DVD player to see if the problem stays same or not.
If you try all sources ie HDMI, AV Component, etc...the TV show the same problem. There are two possibilites: T-Con board or main board need replacing. You should need technician to figure out the problem. Hope it help.

Aug 13, 2009 | Samsung LN-S4051D 40 in. LCD Television

6 Answers

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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!!!!!

Apr 14, 2009 | Samsung LN-T4042H 40 in. LCD HDTV

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