Introduction: Samsung TV On/Off Issue - Repair

Picture of 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!

Picture of 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

Picture of 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

Picture of 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

Picture of 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

Picture of 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

Picture of 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


waicuhi (author)2017-04-28

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 ?

GordonLMacWm (author)2017-03-30

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.

LABlackledge (author)2017-03-07

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!

RemyB2 (author)2016-04-17

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 ?


FrançoisM36 (author)RemyB22017-03-04

Tu as trouvé une solution ?

RemyB2 (author)FrançoisM362017-03-05

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

MonstaB (author)2016-11-14

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

FrançoisM36 (author)MonstaB2017-03-04

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

MonstaB (author)MonstaB2016-11-15

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??

Kb69 (author)2017-01-28

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.

rdematteo1 (author)2016-11-28

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.

stormy1241 (author)2016-07-28

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.

stormy1241 (author)stormy12412016-08-16

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.

CarlottaT1 (author)2016-07-08

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?

jnaykar (author)CarlottaT12016-07-30


jnaykar (author)2016-07-30

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. :)

DavidK192 (author)2015-11-25

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 (

DevanteP (author)DavidK1922016-06-10

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

TrellC (author)DavidK1922016-04-09

I need your

StevenB138 (author)DavidK1922016-03-30

Thanks David! Worked like a charm.

MarcoP60 (author)DavidK1922016-02-22

Very helpful Dave thanks for that your suggestion worked for me too ;)

Rsatsang (author)DavidK1922016-02-13

Wow! Thanks so much David! U r a savior! Ur trick worked for me. I opened up the back checked both boards, no noticeable issue. I unplugged and replugged all connectors and voila!! It worked like a charm. Serviceman gave me an estimate of $350. You saved me a fortune. Thanks a lot!!

TrellC (author)2016-04-09

David i need your help

Marine1968_69 (author)2016-03-10

Your article is good,but with 45 years experience I must say,NEVER ever use a soldering gun to remove these capacitors especially if you are inexperienced as this article is written for,Instead use a soldering IRON between 30 and 45 watts or you may burn the PC Traces and if you do you will need someone experienced to repair the traces and put things right again.

KimberlyS63 (author)2016-02-11

I have the exact tv in the video, but I don't see any bad capacitors on mine. Can you help. I know nothing about this kind of stuff bit my tv has started turning itself off and on and sometimes buzzing with a high pitch sound . Should I replace all the capacitors? I see a total of 17

KimberlyS63 (author)KimberlyS632016-02-11

actually there are 19 total

cibnetsac (author)2016-01-25

I have a power supply board from a un32d5500 samsung led tv with this issue. I tested the voltage output conected and disconected to the main board, when is disconected voltages are ok 5v and 12 v, but when a plug to the main board starts the on/off cycle again and the voltages go down to zero and back to normal in the same cycle, capacitors shape look fine.

catalinvalentin (author)2015-10-16

ciao.condensatorul de25v 1000uf se poate inlocui cu35v 1000mf???

mm0bef (author)catalinvalentin2015-12-31

Yes just dont put one in with a lower voltage than the origional one

Clemsonguy3 (author)2015-11-27

Can you circle the bad capacitors in your picture? I'm definitely not an electronics guru but i cant see a problem with mine...but I could just be missing something

SamsonG4 (author)2015-11-24

Thanks for this was able to get it done and save hundreds on repairs. It's not as tough as it looks. Thanks again friendo

JacksonG3 (author)2015-11-01

Used this tutorial today to fix my 52" Samsung TV. Everything was very thorough and I was able to repair it for $4 at Radio Shack instead of at least $100 at the local repair shop. A huge thanks to the author!

Vay2do (author)2015-10-23

I have a similar problem with my LG lcd tv , will it work on it?

JonathonC3 (author)2015-10-22

Just changed out all capacitors, and it works!!! Thanks for the tutorial.

uwaila (author)2015-09-16

i have a Samsung 43 inch 2014 model, the stand bye light comes on and off ,i check the voltage of the power supply 15 volts come on and return back at that time. when the stand bye light went off the 15 volts will stay but no picture no sound

LarsH3 (author)2015-08-05

I have a 2012 55 inch Samsung LED TV great TV then it starting shutting down and shutting off. I was on the phone to Samsung. The woman went through all possibilities and while I was talking to her my TV shut down and restarted. After 20 minutes she booked me in for a repair by a Samsung repair.

The repair guy came to my house and did a diagnostics and found that the WiFi unit in the TV was faulty and this would cause the issue. However without knowing as I made a bathroom stop the guy told me he also replaced the power board and ovber the last 24-48 hours no problem.

they replaced the components free of charge

hope this helps

Scaffolder (author)2015-04-06

I have the very same issue that my Samsung 60in keeps turning off and on
, i have removed the Power board and see no capacitors with a bulge or
leaking , could it be something else ?

got s smart tv 60" with the same issue, just order a new power supply board

Easy if you live in the USA , Harder if you live in the UK unless you have a link

Scaffolder (author)2015-04-08

Mother Board maybe ?

pfred2 (author)2013-01-10

I did this. Make sure you get the right size capacitors. The first set I ordered were too large in diameter to fit onto the board. They're really packed in there right next to each other. I used the same value capacitors, but I got higher quality capacitors manufactured by Nichicon. So far so good.

MikB (author)pfred22013-01-12

Packed in there right next to each other, and next to a massive heatsink, it's no wonder they failed. What happened to space for air to flow? :)

pfred2 (author)MikB2013-01-12

That wasn't the reason. The brand capacitor Samsung used wasn't the best.

On/Off issue happened to my TV recently. Found this through a forums search. Contacted Samsung and as of Feb 2014 they no longer honor the repair cost. Was informed to contact local repair center. May do it myself to try and remedy the issue rather than shelling out a repair bill that is half the cost of a new TV nowadays.

HollyH3 (author)2015-02-19

I ended up replacing 3 of these and now it won't do anything BUT click. Any advice? Trash the tv or try again?

geoff.harrison.355 (author)2015-02-10

hi I have replaced the capacitors , all good for 2 days now I cant get it to come on I used high quality capacitors and now I cant turn it on , what do you think it could be regards Geoff

The_Black_Hole (author)2014-12-19

how much larger of a voltage? I'm having trouble finding the right one. I found plenty at like 250v 47uf but the one I took out is 160v 47uf...

the voltage rating on the capacitor is the maximum voltage it can handle, in other words you can go higher without a problem, but dont go lower.

marybeth.hennessy.5 (author)2015-01-25

Where do you live? can you come over and do that to my tv?

drbob1988 (author)2015-01-05

Excellent instructions. Bought the capacitors at Radio Shack, so far so good!! Works like a new one.

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