Samsung TV On/Off Issue - Repair

Introduction: Samsung TV On/Off Issue - Repair

A few years ago many Samsung TV models were produced with underrated capacitors on the power board of the TV. The result of this issue is a TV that will cycle between on and off repeatedly and/or an annoying clicking noise while turning on. Time to get informed about the issue and fix your TV your self! 

Step 1: Get Familiar!

If you're having this issue click this link below!

It seems there is some money available or a possible repair to those with this issue that meet the qualifications listed. If you don't meet the qualifications, you're not interested in the red tape or just like the satisfaction of fixing things your self continue you reading and I will show you how to fix your TV for under 10$!

Some tools you'll need going forward are a screwdriver, a soldering gun and some solder. Time to get this ship sailing! 

Step 2: Open Up the TV

Depending on your TV model you will have a different number of screws to open up the TV. They should all be located on the back and should all be pretty easy to spot. If the back won't come off easily you probably still have a screw in so keep looking. Also don't lose these, you'll need them later! 

Step 3: Disconnect the Power Board

The board we're after should be a brown/beige color. Your TV might have and extra metal covering over it, go ahead and take that off. The other board you can see controls most of the main functions on your TV while the board we want regulates and distributes power to the TV. I'm going to recommend that you don't touch the main board at all.

Before we get at our board make sure your TV is unplugged. Even once unplugged the TV can hold a lethal amount of energy in some of the bigger capacitors so press the on/off switch on your TV a couple times to help discharge some of that. Even still, be very careful with what you touch paying special attention to the HOT section of the board and all big mad scientist looking components, especially if you don't know what they are or what they do. 

Now that you've got an idea of what you're looking at go ahead and unplug all the wires connected to the power board. Each wire group should have a different number of headers and should only fit back into the slot it came from but take note of where they did come out of so you don't have to fumble the board when you're putting it back in later. Next unscrew the board and lift it out. 

Set the board on a nonconductive surface and we'll check it out! 

Step 4: Remove the Bad Capacitors

The bad capacitors should be pretty easy to spot. They'll have a notable bulge on the top and may even be leaking some electrolytic fluid. In my case two capacitors had gone bad, as seen in the picture. We're going to need to take these out in order to put some new ones in. 

If you're a super safety freak you may want to discharge these capacitors before you try to take them out. You can do this by touching the ends of a resistor between the two ends of each capacitor on the bottom of the board. But unless you have a massive capacitor that is your problem child it really shouldn't be an issue. 

Before you remove the capacitor identify first identify its polarity in the circuit. The capacitor should have a white stripe up the side, note where this is as you will want to put in the replacements with the white stripe on the same side. 

To remove the capacitors first identify the where the leads attach to the circuit at the bottom of the board. Warm up your soldering gun and heat the contact point on the circuit while gentle pulling the capacitor out of the board. Don't be too forceful pulling it out and don't hold the soldering gun at the contact for too long, both could damage your TV. Just be patient and you'll get it out. Remove all the bad capacitors. 

Step 5: Replacing the Bad Capacitors

Your bad capacitor should have a few numbers on it including a capacitance rating, a voltage rating and a temperature rating. You're going to want to find a capacitor with a similar capacitance and temperature rating to the one you removed. But go ahead and get one that has a higher voltage rating as you don't want to replace an underrated capacitor with another underrated capacitor. Also try to find on that is a similar diameter so it can fit in the spot it came from. Also make sure its a radial capacitor, axial leads will be too difficult to deal with. Look up prices on line, but you should be able to find what you need at your local radio shack or Fry's for cheap enough. 

Place the capacitor back into the circuit remembering to orient the capacitor so it is has the correct polarity. Bend the leads out so it will stay in place as you solder. If you've never soldered before peep an instructable for some handy tips! Solder the sucker in place and be sure that your solder is not touching any other connection on the board (you don't want any shorts!). Repeat for each capacitor you need to replace. 

Step 6: Reassemble the TV

Since you kept track of all your screws and connections, putting the TV back together should be a cinch! ;) As soon as the power board is connected again and screwed back in place plug in your TV and try to turn it on... Voila! Your TV should turn on and off just fine. If the problem persists, you may have over looked a bad capacitor so take it off and look a little more closely. Put the back of your TV back on and you should be ready just in time some Sunday morning cartoons! Enjoy



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    51 Discussions

    The link to the "Samsung Capacitor Settlement" site went nowhere except a general Samsung can we sell you something site.

    I have a samsung uE55D7090LS. I have the same problem but all my capacitors look fine(no bulge). I have also tested all of them with an ESR meter but no bad ones .

    Does anyone have an idea what the problem could be ?


    For my Samsung UN32EH5300fxza I purchased a power board model BN44-00493A from eBay for $20. Even though I have a butane soldering iron, saving a few bucks by replacing capacitors on the (potentially) expired power board is not worth it to me.

    Had similar issues with my SS TV, rebooted randomly and often. Chatted with SS help and went through many of the steps people are going through here (factory reset, set ECO power off, unplug from networks, etc) none of that worked, reboots continued. Then SS said to unplug from my surge-protected power outlet and plug into the wall (I rolled my eyes), so I tried it and now after 5 days not a single reboot! Unbelievable!

    I have the same issue with an old PS50C6500: TV goes on and off every few seconds, but can't see any dead capacitor. Also tried DavidK192's solution (unplugging every card for the power board and reconnecting them) but it did not solve the issue.

    I found a power board on the internet for 55€ (I live in France), but I wonder if it's worth trying to change it. Any way to make sure the issue is indeed the power board, and not another one ?


    2 replies

    Non, j'ai changé la carte d'alimentation et ça n'a pas résolu le problème.
    J'ai racheté une télé pendant les soldes :/

    I have also same problem guys. This is my 4th time I am trying to fix the same problem. What I find out I replace 2200uf 10v into 2200uf 25v. works but...after 30 min. it started to going ON and OFF again. Basicly I did change about 5 capacitors in total. Any suggestions? Is it there maybe any other issue what I missed? Thanks

    2 replies

    I have the exact same board. Did you make it work?

    I havent fixed! It worked few hours without any problem and day after I turn it ON and had some lines all over the screen. I switch OFF and back ON again and was fine..Keep working again. But few hours later when I switch back ON again all I seen was same lines on the screen and never go back to normal even if I try to turn ON and OFF a few times again. Strange??

    After 5 years my TV just started cycling on and off, it was during a recent heat wave. I tried all the old tricks, nothing worked. I unplugged the cable from the power board to the control board then pushed it halfway in and it worked. Pushed all the way in and it cycled. Very sensitive, so I can't just leave it half way in. Turned over the power board and noted the last two pins on the socket aren't soldered. Should they be? images attached.

    My 50" samsung started constantly resetting itself over and over again after a power outage and is just 3 months out of warranty. Could the power outage have caused the capacitors to fail? if so, this could save hundreds in repair costs.

    Pull the AC plug. I have and LTJ46 SmartTV. The best place to start is by re-seating the connectors. The smallest corrosion or dirt can be a big resistor to milliamp circuit and cause big trouble. Before you disconnect, take a photo of your connections (cable,antenna, DVD, ect.) on the back of the TV. Then disconnect and lay the TV down on a blanket face down and take out the screws, don't forget the one in the cable connection area. Once the back is off carefully disconnect all connectors on the circuit board by pinching on the sides or on the top and bottom depending on the plug. Don't pull on the wires! Re-seat the connectors two or three times making sure you get them "snapped" in. Re-assemble. It worked for me after putting up with twice a week on/off cycling for a year. It really got bad in the last week.

    1 reply

    Okay, after 21 days I have not had even one cycle. So for many of you it might be just a matter of disconnecting and reconnecting board connections. I was gong to use some cleaning solvent but I didn't trust the brand I had on hand. You need to use the good stuff that doesn't melt plastic.

    A technician told us that we needed to replace this part. A lost it and this is my only photo I can't make out the letters, anybody familiar with this?

    1 reply

    I could fix one samsung by replacing the bulged capacitors on the power supply board. I am working on couple of other Samsung TV's (Plasma, LCD) also similar issues but acting in different ways. One of them all the capacitors looks good. I think IC is the culprit on that. On the plasma I tried replacing some bulged capacitors, but didnt fix yet. It turns on after several loop. I will keep posted if I find exact problems. Capacitors, diodes, IC's, fuses are some of the culprits. I am not a professional repair person. :)

    I know how to make it work if your sumsung smart tv keeps turning on and off . its not a capacitor most the time , i had the same problem but i fix it my self so hear is the trick open up the back of your TV and unplug the connectors wire from your TV power board and plug it back it will not turn it off again . hes my email if you guys nned more help (

    2 replies

    My smart TV everytime I turn it on it reboots constantly without going back to a normal screen

    I need your