How to Fix Samsung LN46C630 Screen Flickering Issue

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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 Amazon.com 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 October 19, 2015: NO ISSUES TO REPORT!
UPDATE February 23, 2017: NO ISSUES TO REPORT!

Step 1: 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

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

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

Step 4: 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

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!

2 People Made This Project!

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136 Discussions

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Deep0197

9 days ago

Does this also work for plasma tv?
Its screen is behaving abnormally. It turns black gradually, sometimes green and red pixels show up, sometimes burns to red only and sometimes works perfect.
Need help please.

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goforq

21 days ago on Step 5

Greetings. Has anyone found which jumper to cut for LN46B640? Thanks!

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NoelA11

4 months ago

the often cause of the flickering is the energy saver mode, so by turning it off via settings on the menu function on screen can often fix it without the need for getting out the screw driver and wire cutters. if you do resort to this drastic solution, please be aware of the dangers involved. there are live components if plugged in, and even after unplugged there are still capacitors on the power supply that can hold a charge, so a dropper tool or screw can cause major damage. take care.

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jwfan

Question 8 months ago

Hello,

I have a Samsung 46" Flatscreen that is 5 years old, and now has this problem. It is a model UN46EH5300F. I need to know WHICH jumper wire to cut, and have provided some photos.

Can anyone help me?

Many Thanks!

IMG_0199[1].JPGIMG_0197[1].JPGIMG_0198[1].JPGIMG_0201[1].JPGIMG_0200[1].JPGSamsung-UN46EH5300F-Power-Supply-Board-BN44-00498B.jpg
1 answer
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jwfanjwfan

Answer 8 months ago

Unfortunately I never received details or confirmation on the correct wire to cut. If anyone does, I'd like that so that I can fix this TV!

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RobertH555

1 year ago

Unfortunately this resolution, while helpful, doesn’t include the correct Jumper wire for my model(photo), Samsung LN40”. Does anyone know the correct wire to cut? I already have my Samsung off the wall with the back plate removed. Thank you

3B0A3AC1-D2AE-44F1-A287-73EEF83DD41A.jpeg
3 replies
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KristyK13RobertH555

Reply 8 months ago

Hi! I have the same model. Did you find out which to cut and did it work? I’m working on it now.
Thx!!

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RobertH555KristyK13

Reply 8 months ago

Kristy,

Unfortunately I never received details or confirmation on the correct wire to cut. If you do I'd like that info.

Robert

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KristyK13RobertH555

Reply 8 months ago

I never did either so put back the tv and it still starts flickering after about 30 minutes:(
If anyone knows what to cut for this model pls email me at sunshine8822@gmail.com
Thx!

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Mattchance

10 months ago

We’ve been having sporadic flickering for months. Was about to give up on this tv and get a new one...then saw this post on my LN46C630...and it worked perfectly. FIngers crossed that it’ll stop long term. Thanks so much for the post!

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ZachF28

Question 11 months ago

I have a Samsung LCD tv flickering LN37A330J1D and I am also having this issue, however, JP-852 does not exist on any of my pcbs. Does anyone know the correct jumper to cut? (There is a J### style to the numbers, the p is missing)

image.jpgimage.jpg
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RobertH555CiconneR

Reply 1 year ago

Were you able to find the correct jumper? I have similar model with same issues. Thanks

86A8F77B-5606-4998-BFE1-77E361C3E3F1.jpeg
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goldenanimalCiconneR

Reply 3 years ago

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?

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AlvinH4goldenanimal

Reply 3 years ago

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?

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mikehall40

6 years ago on Introduction

Hi there. I have a similar issue with my 40inch Samsung. 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!

Mike

1 reply
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RobertH555mikehall40

Reply 1 year ago

Mike, did you ever find the correct jumper? I have similar model with same issues. Thanks

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LynnH84

1 year ago

Dude. We have been living with our tv flickering on and off for over a year! We were just about to buy a new one out of frustration, but we stumbled upon this article today. We took the risk and the tv works great!! Thanks for saving us $$$$$$$$$ :)

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d1breadman

1 year ago

Samsung model UN46FH6030F- just fixed by cutting j854, so far so good