Introduction: How to Fix Samsung LN46C630 Screen Flickering Issue

Picture of How to Fix Samsung LN46C630 Screen Flickering Issue

The Samsung LN46C630 TV has a known issue with screen flickering after the warranty has expired. Rather than pay $150 at your local repair show, fix it yourself in 15 minutes!

The fix for this issue is easy. There is a jumper on the power supply named JP852. If you cut that jumper, the screen flicker will no longer happen. I do not know what JP852 is used for, but apparently there is a service bulletin from Samsung for this fix. Thank you to Denise from an review (here) who provided the details on this fix.

Please assume this will void your warranty and potentially break your TV. After doing this fix on my own, my TV has been running fine since February 18, 2012 . I will update this guide if for some reason my TV stops working.

UPDATE June 14, 2012: It has been a few months and my TV still works great!
UPDATE December 31, 2012: My TV is still going strong. NO ISSUES TO REPORT!
UPDATE March 16, 2013: All is well! It has been over 12 months since I cut the jumper and everything still works as well as the day I bought it.
UPDATE June 19, 2013: Still going strong. NO ISSUES TO REPORT!
UPDATE February 23, 2017: NO ISSUES TO REPORT!

Step 1: Symptoms

Picture of Symptoms

The symptoms of this issue are mostly described as "screen flickering".  It mostly happens intermittently at first, then gets progressively worse.  HDMI connections start first, then component, etc.  If the user turns the TV off, then on, it usually fixes the issue for a little while, but it eventually comes back.  After a month or two, the screen will flicker be permanent.

The model fixed in this tutorial is a LN46C630K1F.  This fix is supposed to work for all TVs in this class.  I did see something online about this issue happening on other Samsung TVs in a different class and the fix was cutting a different jumper.

Step 2: Remove the Back Cover of the TV

Picture of Remove the Back Cover of the TV

There are 18 screws (there is a harder to find screw in between the two rows of component jacks).  A normal sized Phillips head works.  If you are leaving this TV on the stand base, remove the bottom two screws last and be careful, it just sitting on that base without any screws!  I recommend replacing the bottom two screws after you have the back cover off so you TV does not fall off the base.

Step 3: Find the Power Supply

Picture of Find the Power Supply

The power supply is located where...  the power cord plugs in!

Step 4: Find Jumper JP852

Picture of Find Jumper JP852

Jumper JP852 is located on the power supply in the top left corner just below the 46.  It connects something labelled 'Input rating' and another labeled 'COLD'

Step 5: Cut Jumper JP852

Picture of Cut Jumper JP852

This is easy and you can probably just use scissors.  Cut the jumper on the middle and separate the wire so it doesn't touch.  Put the case back on the TV and you're done!


thosjasbro (author)2017-12-03

If my TV wasn't wall mounted the fix would have taken 15 minutes - tops! An electric screwdriver helps. Don't forget the screw that's hiding next to the coaxial connector.
I've seen the same fix for other models point to jumper JP854. Search the net for your specific model. Thanks.

Crmoss61 (author)2017-11-26

Will this work on a LN55C610.?

619ESE (author)2017-10-04

I have the same problem on my Samsung PN51E450A1FXZA I couldn't find the JP852!!! Does anyone knows which jumper to cut on this model??? any help will be really appreciate.thanks

svelund (author)2017-09-21

samsung le46c535f1w norvegian model cut jumper jp 852 worked fine. locaded upper left side

GauravD19 made it! (author)2016-03-03

I have a Samsung UA32D4000. I too am facing a major Flicker issue. I opened the TV and there is a JP852 on the board, however I am not sure if this is the solution for this TV model also, attached picture of the board. Please advise.

DanB227 (author)GauravD192016-06-18

Hi GauravD19 - i have the same screen, and have this issue. Did you get yours fixed? Was it the same jumper?

GauravD19 (author)DanB2272016-07-10

No it was not the same jumper, I snipped it but the problem is not fixed !

I guess there is still no solution for this model.

ChanderV (author)GauravD192017-08-13

GauravD19,DanB227 : Any luck there after . I have a 32F-4000; hopefullyit is the same. I am yet to open the 17 screws!!

DanB227 (author)GauravD192016-07-10

OK - thanks for that. Guess it's time for a new screen then.

silvajordan52 (author)2017-06-06

I have LG 55 inch tv 55lb5550-uy started flashing the screen in a strobe kind of way, I don't know what part it is but I have torn down. any help or advice would be much appreciated.

IndraG11 made it! (author)2017-04-12

Thanks for information. My TV model UE46ES7080 has flicker problem. I have cut one of the jumper near input information. It is fixed the problem.

SureshR38 (author)2017-03-11

I have Samsung 32inch LED TV.. model no.UA32J4100AR having flickering issue but I can't find the jumper.. pls help me

TimG145 (author)2017-01-16

I have a UN46FH6030 Samsung. Took the back cover off but could not find the appropriate jumper, so decided against cutting anything. I currently resolve it by setting the backlight setting down to 1, then can increase it to 2 after viewing a while. However, it is very annoying and I am probably going to invest in another TV.

MonG14 (author)2017-01-10

Hi there., do you know the jumper of coby tftv 2225t.. thank you

emmysb1 (author)2016-12-28

Great information. Question, I have a 48" LED, model UN48J5201AFXZA. What's the jumper number to cut?

AkramA23 (author)2016-12-27

OK! So I tried this on my LE46B535 (Swedish model), after experiencing some issues with pulsating backlight that started this morning (2016-12-27) and became worse by the hour (from one input intermittently to all inputs permanently). I bought the TV in the beginning of 2009, so TV is waaay past its warranty. I had a choice to make: 1) try this solution and risk bricking the TV or 2) buy a new TV. It was a bit difficult to find jumper JP852, but after 4 searches I did (lower right side of the circuit board). It worked, and the issue has not returned even though an hour has passed. Hopefully it will stay that way. Thank you!

FaizalW (author)2016-12-27

i have samsung UA32EH5000M (32"), what jumper should i cut to solve the flickering/flasing prob?? please help

poztz321 (author)2016-12-27

Best solution big discount :) Samsung UN65KU6300 65-Inch 4K Ultra HD Smart LED TV (2016 Model)

jjstep01 (author)2016-12-01

I have a Samsung Full LED 50 in Smart TV. I cant find any tricks to fix our flickering problem...HELP!

woutera (author)2015-11-25

Problem with flickering black light solved on other Samsung TV.

Just remove one of the cables labeled Pwm dim or e-Pwm. This signal is used to dim the backlash, remove it and it will burn full.

mrozaini_ar (author)woutera2016-11-16

its work for me model LS22c , I just remove the red wire between the power supply and processing board. The wire labelled as DIM but not PWM. I think both is same. Thanks you for give me some idea.

woutera (author)woutera2015-11-25

Backlight....... Damn auto-correct.....

sdh445 (author)2016-10-26

Fantastic!! Thank you!!

Watsoned (author)2016-10-02

I have an LN52A650 that I've been having a flickering issue with. I found theJP852 wire but wanted to be sure it was still the same one to cut before I try it. The layout is totally different since it's a 52".

HeatheMC (author)2016-08-23

I had an issue with my LN46C630K1F several years ago. Luckily, it was still under warranty. However, whatever the guy replaced didn't actually fix it. But, found that when I put it on standard instead of dynamic after leaving it off for some time. Two years later and today it's back flickering. I cut the JP852 wire, but to no avail. I have the same tv in the 40 or 42" and never had issues.

Guess, it's time for a new tv unless anyone else has any other ideas.

albyrfc (author)2016-02-15

Can any body help is jp852 the small one or the bigger one

CIY1069 (author)albyrfc2016-07-16

The small one

MasonP12 (author)2016-07-06

what if that jumper is nowhere to be found!?

MuhammedR6 (author)2016-06-21

cut jp852 nothing works same double image

MuhammedR6 (author)2016-06-21

i have 32 samsung UA32D4000N model it double Image and flicker issue. plz help me...

AntonioD49 (author)2016-02-18

I have a samsung model LN-S4051D. I snipped the J825 wire but the tv still has the blinking. But, I could plug something into the audio video plugs and it works fine. But nothing with HDMI with work. Any suggestions?

Denisejimenezguevara92 (author)2016-01-21

My tv just blinks no pictire is showing anymore. Sound is on but that's all. Would this help of so which wore should I cut?

It's model UN60FH6003

TimS126 (author)2016-01-12

Would this work on a Samsung LN40E550?

BryanR39 (author)2015-12-29

thanks for posting this! Same model tv purchased in 2010. Snipped the jp wire and tv works great now. Thanks again!

CiconneR (author)2015-07-17

mine is LN40C630 but the power supply is different which is my jp852

goldenanimal (author)CiconneR2015-07-21

I have the same. An LN40C630 also. Can't find anything labeled JP. Lots of JW's but no JP's. Any idea on what the 40" equivalent of the JP852 is?

AlvinH4 (author)goldenanimal2015-11-09

Hi There

Nothing with JP, and only two digit numbers JWs on my TV. Any suggestion.

Did anyone give you an answer too this problem? If so can you pls let me know what jumper will work?

AlvinH4 (author)2015-11-09

Hi there.

I have a issue with my 40 inch Samsung (model LN40B540FXZA). I took the back off and looked all over the board for the named jumper. But all I can see is jw numbered jumperes. Nothing with JP, and only two digit numbers, ex jw85 vs jp852.

Is there a fix for this model, or does it perhaps need a new power supply
Any info would be greatly appreciated!


RhondaW18 (author)2015-11-08

Thank you! Screwdriver+ wire cutters + 15 minutes = FIXED

eanda36 (author)2015-10-19

Glad to hear everyone is having so much success with fixing their TV! Sorry I can't help all of the people with different models, I can only confirm that it works on the model in my instructable.

ChrisB170 (author)2015-10-19

I just did this to my Samsung 46" LN46C630 TV. Took about 15 minutes to take the TV off the wall, remove the back panel, snip the JP852 jumper and it worked!!! No more flickering of the screen. I was going to go out and buy a new TV so this fix saved me $1000! Thanks!

ChrisB170 (author)ChrisB1702015-10-19

And my TV is 5 years old!

KirbyB2 (author)2015-10-10

I just did this to my 5 year old tv, its been flickering for over 3 months, it got so bad that we put the tv away and used our old one. It works now! Absolutely amazing, thank you for the easy tutorial! Let's see how long it will last! Oh btw, we were going to throw it out, you just saved us a bundle!

BrandonL17 (author)2015-08-30

I just did this to my tv...went from flickering so bad that you could not use it. it works perfect now!!! thank you thank you thank you!

DustinW6 (author)2015-08-24

What jumper do i cut to stop flickering screen? I do not have jp 852 jumper.

JaiS2 (author)2015-06-06

Hey Guys! I suddenly faced Screen blinking issue in my Samsung 32F5100 TV which is just above 1 year old(Out of Warranty).

I Cudn find the JP 5854/JP 852 Jumper. It starts from JP 801 to JP 829 and some other series of Jumpers.

I called up the Service gut from Samsung and he has given a repair Estimate that would cost a new TV :(

It would be really great if someone can let me know how to fix this issue for my model

Samsung F5100.

Many Thanks!!!!

DustinW6 (author)JaiS22015-08-24

Did anyone give you an answer too this problem? If so can you pls let me know what jumper will work?

HabMoh (author)2015-08-09

Which one I need to cut to fix the flicker problem on the screen

HabMoh (author)2015-08-09

I haven't seen anyone have answered for 40 inch TVs. I have LN40D630 but didn't find the exact jumper number from this forum. Note sure cutting the jump would really work.

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