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 Post subject: Samsung TV
PostPosted: Jun Tue 11, 2019 11:59 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 233
Location: Fitchburg Ma. USA
It is not an antique but I am trying to fix it. Model LN46A550P3F SN ALXK3CEQC07910L I replaced power board( which I bought online) sent it back got another one and all it does is click every so many seconds. Could I have another bad board? Any ideas as to where to look next? There are a couple more boards but guy I dealt with said it would most likely be the power board. Can not see any burnt or bulging caps. Thanks paul


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 Post subject: Re: Samsung TV
PostPosted: Jun Wed 12, 2019 2:23 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 33314
Location: SoCal, 91387
This might be a better board to ask on; http://www.videokarma.org/

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\\\\\\\\\\\\\\\\\\\\\\\\He Who Dies With The Most Radios Wins//////////////////


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 Post subject: Re: Samsung TV
PostPosted: Jun Wed 12, 2019 2:36 am 
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Joined: Sep Tue 30, 2014 6:08 am
Posts: 4886
Location: Norfolk, VA
With 46" LED TVs now less than $229, I can't understand the economics of repairing a 9-year old TV. I have a Samsung LN46C650, and when she goes, it'll get replaced, with a newer, feature filled set.

My Samsung draws 210 watts - the new 55" sets draw 1/5th that. Again, economics.

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"Capacitor Cosmetologist since 1979"
USN Retired 1984-2006 (Avionics/Cal)


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 Post subject: Re: Samsung TV
PostPosted: Jun Wed 12, 2019 8:28 am 
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Posts: 33314
Location: SoCal, 91387
Maybe he wants to fix it because he'll get satisfaction from making it live again. A lot of us are like that, and put time and $ into sets that certainly don't deserve the love based on their economic value; it's just the challenge.

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 Post subject: Re: Samsung TV
PostPosted: Jun Wed 12, 2019 12:42 pm 
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Joined: Sep Tue 30, 2014 6:08 am
Posts: 4886
Location: Norfolk, VA
fifties wrote:
Maybe he wants to fix it because he'll get satisfaction from making it live again. A lot of us are like that, and put time and $ into sets that certainly don't deserve the love based on their economic value; it's just the challenge.


Only to die within a year? It's a 9-year old LCD TV - with CCFL backlights. His power board is likely cycling because of inverter load, from bad CCFL lamps. It's not an easy fix, replacing those CCFL lamps - all of them, and sourcing them is another problem. You've got to order 2X what you need because of breakage - thin glass tubes 0.2" (2-3mm) in diameter.....then not to damage the screen, the connections to the screen, and hope that it will work once it's all back together?

Here's the whole operation, albeit on an older set than his, and a full transplant of the CCFL assembly, NOT available anymore:

https://www.youtube.com/watch?v=EO2gHBJCvH0

Sure, lets buy all 14, no 28 lamps, and replace them - no easy task, and as pointed out in the video, if you snap one of the brittle plastic holders, it's scrap once again.

I've seen several go down that road, only to end up thinking......Why did I even start?. No satisfaction whatsoever.

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Brian
"Capacitor Cosmetologist since 1979"
USN Retired 1984-2006 (Avionics/Cal)


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 Post subject: Re: Samsung TV
PostPosted: Jun Wed 12, 2019 3:57 pm 
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Joined: Nov Thu 11, 2010 6:03 pm
Posts: 968
Location: Pewaukee, WI
Time is money if a repair is not quick and simple (like caps) and parts and time cost more than a new or used one even after putting value on satisfaction of doing it myself, then it gets scrapped.... at least anything newer than 1975.


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 Post subject: Re: Samsung TV
PostPosted: Jun Thu 13, 2019 1:59 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 814
Location: dayton oh usa
does the set turn on,play its startup tune,then click?
it may be as simple as 2 tiny,underrated solid polymer caps in the secondary supplies on the mainboard.
unfortunately they are smd so they can be tricky for a first timer.
look for the +5 and +3.3 supplies on the main to droop partway through the boot process.
yes its a computer....


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