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Samsung TV Model Code: UN55B8000XFXZA has no power, no clicking, no lights. All circuit boards look perfect, no bulging capacitors, no burns. 3 fuses have continuity. Can other components be tested

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The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts. ..

Posted on Dec 09, 2016

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Posted on Jan 02, 2017

  • 286 Answers

SOURCE: viewsonic n3251w - no power

A lot of TVs are having their power boards go bad due to a poor brand of capacitor (CapXon usually).

If small problems are noticed with the tv, the solution is to replace the capacitors. However, once the TV gets to the point where there is no power at all any more (not even a stand-by light) then the power supply has to be replaced.

Visit Viewsonic's website or call your local Viewsonic repair shop to get a price on this board. They are usually under $100.

Posted on Nov 26, 2008

  • 210 Answers

SOURCE: Samsung HP-T4234 TV clicks but won't turn on and

there is 3 capacitors close together on main power board that will have raised tops if there is more replace all with same ones e.g (2000mf 25v) and make sure the white line is on same side take picture to help

hope this helps
MERRY CHRISTMAS

Posted on Dec 13, 2009

Testimonial: "I agree that the bulging capacitors are generally the issue, unfortunately I I can't get soo lucky all the capacitors looked fine. Thank you"

  • 927 Answers

SOURCE: Which Replacement Power Board for LNT4665F Samsung LCD TV?

Howdy,
It would be a lot cheaper if you just replace the two caps that have gone bad. Just get a cheap solder pencil from the store and about an inch of solder and you are in business.
The Power Supply Board is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.

Thaks for using FIXYA, BIG IRISH.

Posted on Jan 02, 2010

  • 304 Answers

SOURCE: I have a Samsung LNS3251D 32-Inch LCD HDTV , that

In almost all cases where the set is taking a long time to turn on and then turning off it will be the Power Supply board that will have bulging capacitors, usually three to five. Look on the upper right side of the Power Supply and look for any blown caps. You can replace these caps and you will be fine. Now the other cause can be the Power Switch is shorting out. You can disconnect the the Power Switch but not the IR sensor and then turn ON the set with your TV remote and see if this stops the problem. If you are not skilled in component level repair on the Power Supply board then buy a new Power Supply board and install it.

Posted on Apr 16, 2010

  • 1267 Answers

SOURCE: Samsung LN46A550 LCD power on/off

Apparently this is a known problem with flat panel TVs made a few years ago due to bad capacitors in the power supply. This same problem appeared in computer mother boards at about the same time so that the capacitors went open or shorted causing problems.There is videos on You Tube that addresses this problem see: http://www.youtube.com/watch?v=ZccykxrtX9g as a starting point and look around for other repairs

Posted on Jan 25, 2011

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1 Answer

Samsung Plasma TV clicking and not turning on.


If you wish to get some details; visit the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to Plasma TVs are given. You can get an idea about the fault to an extent.

Jun 16, 2015 | Samsung Televison & Video

1 Answer

Why isnt my samsung tv powering on?


usually with samsung tv's they use 10 volt capacitors on a 12 volt circuit board , most definatly one of the capacitors has bulged or popped on the power board if you do not know what a bulging capacitor looks like please google a pic of it then take the back of your tv and check the power board for bad capacitors

Aug 14, 2014 | LG 42LC2D 42 in. LCD HDTV

2 Answers

Samsung LCD TV not switching on, but just clicks away.


Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.

But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Regards.

Jan 05, 2012 | Samsung LE Televison & Video

2 Answers

I have a Samsung LN52A650A LCD TV that 3 years old. Today when I go to turn it on it just clicks and does not turn on. The clicking wont stop...it clicks about once per second. I have to unplug the TV to...


The tv power supply board have dead components parts call capacitors most likely.U have all the tools and understanding basic electronic also can do basic soldering too?The tv power supply board that the board where the power a/c cord plug into it.Take the tv aparts and check the tv power supply board carefully for dying and dead capacitors parts.These capacitors parts are alway bulges up or puffing up on to it tops.Must replaced all these dying capacitors parts are bulging up ur puffing up on to it tops.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish power supply board for the replacement.

May 11, 2011 | Samsung LN52A650A LCD TV

2 Answers

Can't turn on tv with remote or manually


Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck.

Mar 21, 2011 | Samsung LN19B360 19 in. TV

1 Answer

Hi i have a samsung 40" LCD TV wiht the clicking


Useally it 3 more,it alway on the tv power supply board.The the board,where the power a/c plug into it.Seaches the entire power supply board for dying capacitors,it alway bulges up or puffing up on it tops.By replacing all these capacitors with the same Micro Ferit and about 10 voltage rating higher for those dead capacitors for better tolorance next power supply board spike heat waves.

Jan 27, 2011 | Samsung LE40R73BD 40 in. HD-Ready LCD...

1 Answer

MY 63'' SAMSUNG SHUT OFF BY ITSELF AND DOESNT TURN ON ANY MORE,IVE HAD THE TV FOR 2 YEARS WITH NO PROBLEMS UP UNTIL YESTERDAY


The problem is with the power circuit board components . The capacitors have gone bad. A pop sound is created due to the burn out of the capacitors..Faulty capacitors can be identified either by using an continuity tester or by appearance that i will be bulged at the top...

Most probably the burned out part which created the pop sound must have created a burned appearance in that area. Just check it out...

If you are an novice in working with the circuit board please take it to a technician who will be able to desolder the components and solder it again..

Feb 22, 2010 | Samsung DLP HL-P5663W 56" TV

1 Answer

Clicks wont come on like circuit breaker going on


Ur power board is dead,know how to solders?Check the power board for Capacitors puff up or burst open replaced these capacitors.Or buy refurbish power board on Shopjimmy.com,Ebay.com.

Jan 16, 2010 | Samsung HP-T5064 50 in. Plasma HDTV

2 Answers

I go to turn it on and the vizio label turns white then clicks off


The Vizio VP322 is notorious for having bad capacitors on the power supply circuit board. They will probably be bulging and may have electrolyte leaking. I replaced four bad capacitors (with a different brand just in case) and fixed it. Total cost under $10. A lot cheaper and better than replacing the whole circuit board which may contain the same "faulty" capacitors from the factory.

Nov 12, 2009 | Vizio VP322 32 in. Plasma TV

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