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Old 11-13-2013, 05:18 AM
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I have a 46'' Samsung LE46C530 purchased in January 2011. The strobing only stopped when the back-light was set to zero. Following the various online guides I removed the back panel, cut jumper 852, reassembled the TV, and had it working like new in 15 minutes!

Samsung would not discuss the problem, told me that cutting the jumper would not work, and gave me a service center number that quoted £150 minimum to repair it!

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Old 11-13-2013, 06:19 AM
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anyone knows what jumper to cut in le40c630? board is different...

 

i have a J852 but not near anything similar as 46'' models

 

many guides say JP852 but my says J852

 

i attach picture

 

txs a lot

 

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Old 08-04-2014, 06:13 PM
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Quote:
Originally Posted by lzeplzep View Post
I have a Samsung LN55C650 LCD HDTV and recently it's begun to flash/blink heavily like someone put a strobe light inside the TV. When it's happening, it happens on all inputs and all menu screens. Doesn't matter what the TV is showing. Even when I switch to an input not in use and the screen is blank/black (but the TV is on) you can still see the flashing. So maybe it's a bulb dying or a backlight issue?<br><br>
I've had the problem fix itself both when the TV was on and when I've turned it off and then on a few minutes later. But it keeps coming back. I bought the TV about 16 months ago so I'm out of luck with the 1 year warranty.<br><br>
I've tried switching cables, and using different power outlets. Doesn't seem to matter. Seems like an issue with the actual TV.<br><br>
Any ideas what might be the problem? I've posted a short video if that helps: (remove spaces)<br><br>
tinypic. com/player.php?v=of6ljd&amp;s=7<br>
zshare. net/video/91320027b3170258/<br><br>
Also, it's a very consistent flashing. It doesn't get better or worse because of what's on the TV screen in case it might look that way in the video with the ridiculous sportscenter intro <img alt="" class="inlineimg" src="http://www.avsforum.com/avs-vb/images/smilies/smile.gif" style="border:0px solid;" title="Smilie"><br><br>
Thanks for any help.
Hi, I have the Samsung LN55C830 LCD TV with the same flickering issues you & the 4X" models have. The earlier post of cutting the jumper 854(JP854) on the power supply bd for 55" model worked(JP852 for the forty something inch models I understand) .

Simply removed the back panel, locate the pwr suppply bd(pwr cord plugs in to it), now locate the JP854 jumper near upper left hand corner and snip with wire cutter. Put back panel back on and watch TV!
Note: If it still doesn't work, its probably a bad power supply bd.

Good Luck
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Old 09-09-2014, 02:19 PM
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I have a samsung lcd tv model# LN40B530P7FXZA with the same problem, I took the back off and NONE of the 'jumpers' start with a JP mine say JW with 2 number behind them not 3, I don't want to cut anything assuming I might be cutting the right one.

Please help, cant afford to buy a new tv,
Thank you,
Lena
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Old 10-13-2014, 10:50 AM
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Question SAMSUNG UN60EH6003F flickering

Okay so I have a Samsung 60" UN60EH6003F and having same issues anyone have a solution
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Old 10-21-2014, 03:26 PM
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Hey All,
I have an LN55C630 with the flickering problem. I found the real cause and repaired mine (I'm a tv repair guy).

The tv is flickering because the power supply is failing. By cutting that jumper you are just masking the failure.

The problem was the PFC voltage was way too low. It should be 390v, but was only 350v. This will cause other parts of the power supply to run on a lower voltage, forcing them to use more current than designed. Not a good idea.

The failure is due to 390v being divided down by four small surface mount resistors. They are each 1.5 meg ohms and are used in the PFC feedback circuit. As they deteriorate and loose value, they give a false feedback and the voltage drops.

You can remove one or all four and replace them with a 6.0 meg ohm, 1% 1/2 watt resistor and your tv will be back to new.

Hope that helps someone.
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Old 10-21-2014, 03:44 PM
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BTW, the resistors are RP802, RP805, RP807 & RP810.

If these pics load, they show where the resistors were, but now have a heatshrinked 6.0 meg ohm resistor there instead (actually 2 3.0 megs).

The 390v can be measured where the left end of the resistor is soldered. I only had 348v before the transplant.
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Old 01-27-2015, 11:16 AM
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Originally Posted by derpyderp View Post
I am beyond happy to have found this info as the strobing/flashing was driving me nuckin' futs! However, when I opened up the back panel to my LN40B750, it looks much different than the LNxxC series. Even worse, no JP852 or JP854 to cut. Different board all together. I am seeing a BN44-00284A in there. Anyone know the jumper on an LN40B750 with this board in it? I've searched Google high and low with no such luck as of yet. Thankfully the replacement board is pretty cheap on shopjimmy.com but I'd hate to drop $70 if I can do the jumper fix. Anyone? Please?
Did you ever find out which jumper to cut on this board? I have the same tv and want to fix it but don't know which jumper to cut.
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Old 01-27-2015, 11:42 AM
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Originally Posted by Vince35 View Post
Did you ever find out which jumper to cut on this board? I have the same tv and want to fix it but don't know which jumper to cut.
Nope. It seems this board doesn't have the magic jumper to cut. I eventually wound up buying a new board (actually, it turned out to be used by a dishonest Chinese seller, surprise surprise) but I bought a newer revision model that has been working perfectly since. Without ripping open my TV, it's either the BN44-00264A or BN44-00264C with the "C" being the newest revision at the time I bought it. The PCB board should be white instead of brown like the old revision.

There is one seller in the US with a new one on eBay. You can take your chances on a used one but for the price, I'd get the new one. ShopJimmy advertises it but I have never seen them in stock. Ever. You might have luck elsewhere though.
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Old 01-27-2015, 11:44 AM
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Quote:
Originally Posted by Vince35 View Post
Did you ever find out which jumper to cut on this board? I have the same tv and want to fix it but don't know which jumper to cut.
Quote:
Originally Posted by kdh05 View Post
Hey All,
I have an LN55C630 with the flickering problem. I found the real cause and repaired mine (I'm a tv repair guy).

The tv is flickering because the power supply is failing. By cutting that jumper you are just masking the failure.

The problem was the PFC voltage was way too low. It should be 390v, but was only 350v. This will cause other parts of the power supply to run on a lower voltage, forcing them to use more current than designed. Not a good idea.

The failure is due to 390v being divided down by four small surface mount resistors. They are each 1.5 meg ohms and are used in the PFC feedback circuit. As they deteriorate and loose value, they give a false feedback and the voltage drops.

You can remove one or all four and replace them with a 6.0 meg ohm, 1% 1/2 watt resistor and your tv will be back to new.

Hope that helps someone.
I know this is a bit of a late reply but do you know the model of the 6.0 meg ohm resistors? I still have the old power board after I replaced it with a BN44-00264C but if it can be repaired, I would like totry. If I gave you the old board model number, would you be able to point me in the right direction?
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Old 01-27-2015, 12:03 PM
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Quote:
Originally Posted by derpyderp View Post
Nope. It seems this board doesn't have the magic jumper to cut. I eventually wound up buying a new board (actually, it turned out to be used by a dishonest Chinese seller, surprise surprise) but I bought a newer revision model that has been working perfectly since. Without ripping open my TV, it's either the BN44-00264A or BN44-00264C with the "C" being the newest revision at the time I bought it. The PCB board should be white instead of brown like the old revision.

There is one seller in the US with a new one on eBay. You can take your chances on a used one but for the price, I'd get the new one. ShopJimmy advertises it but I have never seen them in stock. Ever. You might have luck elsewhere though.
wow what a quick reply .
As the flickering is not that bad yet I'll wait with buying a new board and see if someone else knows about the jumper on my board.
If I do need to buy a new board I'll look around in Europe as I live in Netherlands.

If anyone else knows which jumper to cut on a LxxB750 (BN44-00284A) board, please shout!
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Old 05-13-2015, 06:12 PM
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Changing the HDMI cord from my audio video receiver to my TV fixed it.
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Old 05-23-2015, 06:55 AM
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If anyone knows which jumper to cut on a LxxB750 (BN44-00284A) board, please let me know!
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Old 06-06-2015, 06:18 PM
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ln40a550p3fxza

I have the ln40a550p3fxza model and I'm having the same problems with the strobe light effect. Does anyone know if a jumper cable cut will fix my model and if so, which one? I don't have either of the cables mentioned before.
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Samsung Ln55c650 55 Inch 1080p 120 Hz Lcd Hdtv Black , Samsung Ln46c750 46 Inch 1080p 3d Lcd Hdtv Black
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