Question about Televison & Video
Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Posted on Nov 28, 2014
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Posted on Jan 02, 2017
Most likely the TV has a power supply related problem. It's possible that it maybe a bad capacitor or transformer on the power supply board. Or, something simple like a blown fuse inside the TV. The most common board to go bad is the Backlight Inverter Board. It what supplies power to the screen.
But, I can't say it's 100% the problem because I can't actually look at the tv over the internet. I can only make guesses with the symptoms.
You have a few choices:
1. You can try leaving the TV unplugged for 30 - 45 minutes so the TV can discharge and reset itself.
2. If by chance the TV is still under warranty, go that route.
3. If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists.Usually, cost under $20. And most cases the new part cost less than $15.
4. Pay a TV shop to do the repairs. It maybe costly, but get an estimate of how much they will charge. That way you can decide if it worth repairing or replacing the whole TV.
I hope I shed some light on the subject for you.
Posted on Jul 19, 2009
it sounds like one of the boards are going out I would call sylvania and check with there service dept maybe they can send a tech and part out under warranty
Posted on Jul 20, 2009
This is common problem of the 46" LCD. The power supply board has caps defective. You can open the case, look for the power supply. Normally, you will see the two small caps pop up. Replaced those caps, the TV may work again. If it does not work, those FET transistor in the board have been damage. You have to replace the whole board. The board cost $150 or so. You can order direc from SS. Go www.samsung.com//us then look for Support icon. Good luck
PS: Circuitcity still sell stuff by website, you can go there and found complain.
Posted on Aug 14, 2009
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
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