Suggestions on a TV/Electronics Repair Forum

Looking for suggestions on a good forum where I will get some responses and feedback on fixing my LED flatscreen tv. I know some of you here might have some good info to share so here are the details. ..........

I have a Samsung 40 inch LED Smart TV that I bought new in 2012 and used for about 2 years before putting in climate controlled storage. Now I want to use it and it isn't working right. About a month before putting in storage it started acting up. You can turn it on and it will turn itself off after about 10-15 seconds. I've read posts saying to change tv settings/update software, but it does not stay on long enough to do so. I've also removed the back cover and looked for burnt, bulging, or leaking electrical components on the power board; and everything looks good visually.

Can I get some help on what to check, how to check it, and how to repair it? I want to do this myself to learn how to. A factory Samsung Repair Manual would also be great, but the ones I found online to download were not available for my particular model.....found one similar but not the same.

I have a multimeter and am capable of fixing it, just need some guidance since this TV repair is new to me.

MODEL: UN40D5550RF
CHASSIS: U59A
VERSION: FB03
S/N: Z30X3CUB600390H

Have you tried smacking it good ! It actually worked on a Magnavox I had.
Hard to find anyone who can actually fix things anymore. And if you do it costs as much as a new unit.
I wish you luck in your search for info.

Search You Tube. Samsung's have a known power issue and there are several videos showing repairs in detail. The one I'm thinking of specifically involves a failed network module. If you simply unplug the wire to the module the TV works fine and, if you don't need the network connection, you can run it that way indefinitely.

Not only that but a majority of the electronic sections are not repairable by ANYONE. Components, where there are any, are robotically "wave soldered" to the PC board, and are so delicate that if you even think about touching them with a soldering iron, you'll burn the component and the board.

What isn't wave soldered is in an integrated circuit, or is potted and inaccessible. Good luck fixing an IC or getting through that hard epoxy to the creamy center of the failed component.

From a basic troubleshooting standpoint I would say the issue is heat related. Something's overheating and causing the TV to shut down. The odds that it is something a person with a multimeter and a dream can repair is probably slim. Then you factor in paying someone to troubleshoot and fix it will easily exceed the cost of replacing with new.

Have you noticed there are no longer TV repair shops around?? Do you know why there not around any more?? TVs etc. now days are no longer made to be repaired they are made to be used and when they start giving problems you just throw them away. Over the years I have worked at a few TV/Radio repair places but they are no longer there now days. 99% of the stuff in the new TV sets one cannot even remove a bad componate even if you where micro mini qualified to do the soldering which I was back when I was an E.T. in the Navy

I had a similar problem with a garage door opener once, I took contact cleaner and cleaned the circuit board, worked fine after. Must of been dust and moisture causing resistance.

Our "Sharp Aquos" did something similar about 1 month after it was brand new, except ours went off and wouldn't come back on. The reset button on the back made the TV click, and try to come on, but it wouldn't. The manual on-off button on the front gave similar results. Finally, in desperation, I pushed the reset button while simultaneously pushing the manual on-off. The TV came on, stayed on, and has never offered to do that again. We've owned that TV for at least 10 years, maybe longer.

I bought a brand new 50" LED-LCD TV at Walmart for $218 last year. I guess that is why there are no more TV repair shops.

If I would you, I do a Net search for capacitor problems on your TV. There was a flood of bad Chineses caps all over the place a few years back. I fixed three near new computer monitors and one TV with bad caps. For a few bucks each, it was worth it.

Trying to repair one is a gamble.

I had a 2 year old Samsung that just went black. Went on Youtube, tried some diagnostics, nothing showed up as a positive fail, so the recommendation was to replace the power supply and main board. Not much else that can be wrong.

Went on Ebay, bought the boards, supposedly from a working TV that got broke.

Put them in... Nothing.

$50 gambled and lost.

Go to electronicspoint.com and post in the repair forum.

Hello rtr,

Sounds like a power supply issue. Look at the pictures. They are of the power supply of a 42 in Samsung TV. The caps get bulged and fail. The power supply is a 12 volts, while the capacitors are only ten volts. They overheat and bulge and fail. Those in the pictures show black coming out of them. They are 2200uF 10 volts. You can replace them with 25 volts 2200uF Look at the rest as well. You should be able to by a kit for a few dollars. Here are the pictures,

Guido.

Samsung has known issues with the capacitors in there TVs and Monitors. I've had two Monitors go bad after about 2 years of usage. I switched to LG and have had no problems since.