Samsung forum

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Samsung TV Power Issues

by jmef / November 29, 2009 1:09 AM PST

I have a Samsung DLP tv that when I try to turn it on it keeps power-cycling on and off for about 20 minutes before finally kicking on. I have seen posts on this and am wondering how I can go about getting help. I have loved this tv and starting to become very disappointed as I read posts and it sounds like I will have to wait till Samsung says it is an issue or pay myself to fix it - I don't have the money to fix it. I don't feel comfortable trying to fix it myself. Is there anything else that I can do?

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I'm not the only one!
by Kingeptacon / December 15, 2009 11:55 AM PST

I have a LN46A650 and am having the same issues. Any information on this would be greatly appreciated.

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Here's the explanation
by garp926 / December 15, 2009 12:12 PM PST
In reply to: I'm not the only one!
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Thanks a bunch.
by Kingeptacon / December 15, 2009 2:00 PM PST
In reply to: Here's the explanation

The WEB according to garp. Thanks a lot man, incredibly helpful. Now if I can muster up the balls to do some soldering.

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you're welcome
by garp926 / December 15, 2009 9:04 PM PST
In reply to: Thanks a bunch. careful with the soldering. When I took my bad capacitor out, I found that some of the green around the circuit board around the hole came off. I'm hoping it won't matter but I don't have much soldering experience. I'll find out today or tomorrow if it worked. At worst, I'd have to replace the whole board which you can find on ebay for around $100. It's still better than paying them to come over and do the same thing. Good luck with yours

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about soldering
by garp926 / December 15, 2009 9:16 PM PST
In reply to: Thanks a bunch.

I forgot to tell you, here's a really helpful 2 part video on youtube about desoldering and soldering these capacitors.

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by garp926 / December 15, 2009 9:54 PM PST
In reply to: about soldering
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SamsungLCD TV - power cycling
by mikef888 / February 20, 2010 3:23 PM PST
In reply to: link

I have a 46" Samsung LCD TV bought 1/8/08 which started displaying continual cycling when turned on. Problem been getting worse over the past 3 weeks.
Emailed Samsung with a service request on 7/2/10....they have not yet responded.
Through this and other forums, deducted that the power supply probably faulty (bad caps).
Took me under an hour to change them, and under $3.00.
Just need basic soldering skills...and care.
1 - lie the tv face down on flat surface, (no need to remove swivel base)
2 - Remove perimeter screws, wall mount screws, and D-sub connector screws.
3 - Identify the power board by retracing the 220v inlet wires.
4 - Remove metal RF shielding. (may need to remove all connetors to this board). Mark where the connectors go....use permanent marker to keep track. Care must be taken to unclip connectors. DO NOT FORCE.
5 - Indentify which caps are bulging, leaking of damaged.
6 - source new replacements of same rating (I used higher voltage 16v instead of the 10v failed units)
7 - Unsure correct polarity and solder in. TAKE CARE NOT TO DAMAGE BOARD.
8 - Replace bower board, and reconnect all wires.

A very easy fix, and used only two caps.


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