Question about Samsung 51"" Class 51.0"" Diag. Plasma 530 Series TV

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Lg 50pj350 wont turn on, relay just clicks, replaced board and it powered on for about 20-30 sec then shut down and back to a clicking relay. what can cause this and can I fix it?

Posted by Jackie Thompson on


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This is almost certainly what you need:

Pay attention you need to look at your board to find if it needs two or three power resistors and get the appropriate repair kit.

Of course you can also send the board for repair, but at $15 and basic soldering skills required this must be a no-brainer if not for you directly then surely for some of your buddies.

Hope this helps!

Posted on Oct 03, 2013


5 Related Answers


  • 1 Answer

SOURCE: Samsung LCD TV shut off, wont turn back on...?

My samsung lcd is doing the same thing, and I have been told that the power supply is bad. But apparently samsung won'r sell you one.

Posted on Jul 13, 2008



  • 1077 Answers

SOURCE: SP-R4232 does not turn on, makes clicking noise

Most likely the TV has a power supply related problem. It's possible that it maybe a bad capacitor or transformer on the power supply board. Or, something simple like a blown fuse inside the TV. The most common board to go bad is the Backlight Inverter Board. It what supplies power to the screen. But, I can't say it's 100% the problem because I can't actually look at the tv over the internet. I can only make guesses with the symptoms.

You have a few choices:

1. You can try leaving the TV unplugged for 30 - 45 minutes so the TV can discharge and reset itself.
2. If by chance the TV is still under warranty, go that route.

3. If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists.Usually, cost under $20. And most cases the new part cost less than $15.

4. Pay a TV shop to do the repairs. It maybe costly, but get an estimate of how much they will charge. That way you can decide if it worth repairing or replacing the whole TV.

I hope I shed some light on the subject for you.

Posted on Jul 19, 2009

Geffrey Curtis

  • 73 Answers

SOURCE: samsung lcd wont turn on just keeps clicking

Check for swollen capacitors on the power supply board.Very common problem on samsung lcd tv's.

Posted on Aug 28, 2009


  • 1 Answer

SOURCE: Same "clicking" problem with 46" Samsung LCD...does not turn on.

With any luck you will have the same problem asa the rest of us : blown power board capaciters , remove the rear cover {20 screws} look in the middle of the back of the set with the cover {5 screws} removed from the power supply . Now look to the upper right cornerof the board in the middle of the tv there may be 1 or several capaciters leaking from the X shape on the top , this be be your problem match up replacements but source units that have a higher max voltage than 10volts 7 get them soldered into the board . I repaired mine that failed at 16 months for $4 in parts & it took longer to remove the screws than it did to affect the repair. If you are not conifident about soldering on your $2000 tv then take the board to someone for the job to be done , I would not advise this as a first soldering job , good luck I can't belive how common this is Samsung needs to step up ......

Posted on Sep 17, 2009

Jack South

  • 195 Answers

SOURCE: my tv turns off by itself and makes a clicking noise

Most likely it has some bad capacitors in the power supply. Flat--panel sets are VERY hard on capacitors, due to the fact that the "rising heat' from the set "cooks" the caps and they fail VERY early.

Posted on Oct 12, 2009

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Check and replace its main power regulator board. Contact the authorized service center for LG. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy.

Mar 19, 2014 | LG 50PJ350 50 HDTVReady Plasma TV

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Lg 50pj350 plasma tv wont power on, just a clicking relay. I didn't see an obviously bad capacitor and have never worked on something like this before so I replaced the power supply board. with the new...

Never think that only capacitors will make trouble to a TV circuit. There are many other components you can see inside it. Thousands of both tiny to large components are soldered together, to form a circuit. Even if a very small component fails to work, the fault related to failure to that components arises.
A relay click after switch On the the TV, and shuts down, can be of many couses, especially to Plasma displays. You should be sound in electronics, to troubleshoot fault Plasmas, because, the circuit of it will be so difficult to follow, even for an experienced technician.If you wish to know some reasons for the start-up shut-down to plasma displays, check the site linked here.
Pull up previous posts by its left sidebar, or type in the brand name and model number to of your set, to its search box, and press 'Enter' or view it in Mosaic / Timeslide option.

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Wont turn on clicks then clicks back off red light blink 7 times

check the capacitors and replace the power components check mother board also .. not handy with electronics and soldering call tv repairman 75-150 dollars Fix ?????

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Tv won't turn on- its in standby mode. the young lad had the remote before it was turned on.... could he have pressed somethin on the remote which is now preventing it from coming on?

Powering up do you hear the relay click then you may see the display flash (not necessarily), but then the TV clicks back into standby mode. If so there is a component failure.
will need diagnosis by a repair shop. Too many different components it could be for me to guess. but
the common repair kit containes1 fuse (F302), 1 diode (D304), the power resistors (R927 and R929 for the board revisions with these two resistors) and the IC301 voltage regulator IC.

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We have an LG tv 42PC3D when we turn the tv on it clicks on and off and does not turn on. We pulled the back off and the clicking sound was coming from a circuit board # 68719PT299A.

u have power problem. it is the mechanical relay clicking. it tries to turn on but since there is power related problem, it auto turns off again. it is the way they are desinged to prevent further damage. any LG service centre can replace the board or a qualified tech can repair.

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