TV clicks to turn on, but no picture. Replaced 3 capacitors and worked temporarily, but eventually TV revert back to no picture.

The repair man may have used the wrong size capacitors.

possibly capacitors in power supply circuit. look for capacitors with bulging tops & replace.

Reverts eventually means there is some looseness some where. Please check connectors and cables between power supply- TCON, TCON- Panel and main board-TCON. If you cant do it show it to some qualified technician.

The backlight inverter which is also part of the power supply needs to be replaced. If you feel comfortable you can replace the blown capacitors on it.

If you need further help, reach me via phone at https://www.6ya.com/expert/steven_a67ead41eb5fc62a

Did u ever replace the Ballast board for this tv?No?,that ur tv problems.The Ballast board only job are to ignite the tv projection lamp to make it work.U hearing multiple clicks,lamp never ignite up the Ballast board.

Yes,very fixables.Ur tv power suppply board have these parts call capacitors.They are dead and gases leakages,not total,but dying.These capacitors they alway bulges up on it top,puff up on it top,these capacitors are dying,that why tv still have power but it take up to ten min. clicking to recieve power to the rest of the tv.The power supply board,that the board where the power a/c cord plug into it.U have basic understanding of electronic's?U have tools,soldering iron,desoldering pump,solders?Take the tv aparts.U just looking,searches all around the power supply board and replaced these dead,dying capacitors that are bulges,puff up on it tops.Replaced these gases leakages capacitors,ur tv will have it power back to normal and work on the first click.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

I have a Samsung Plasma PN50A450 and one night the TV turned off and the result of trying to turn it back on was simply the set trying to turn on, making a click sound and nothing happened. I pulled the back off, and attempted the capacitor fix that is well documented on the Samsung LCD TVs. I did have a swelled capacitor that I replaced and also replaced the other capacitors that were the same Microfarad rating, temp and voltage which were replaced in a popular UTube video. That did not solve my problem, so I went onto Ebay and bought an entirely new power board for 69.00 plus 14.99 shipping. Replacing the board took about 3 minutes. TV is now working fine and will go back up on the wall in a day or 2. Note, the power board in my TV was a BN44-00205A. That board is no longer in stock anywhere ( I believe because it has been determined to be a bad board) I replaced it with BN44-00207A. Which I suspect is the board that is being used for replacements of the bad BN44-00205A. It fixed My TV. Hope this helps you. BTW, Both power boards are listed for replacing a board in the PN50A450, but the BN44-00207A Specifically states its for a PN50A450P1D. I took a gamble that the BN4400207A would work. It did.

open back cover check 5v filter capacitor on powersupply board that is either 1000uf or 2000uf
do you see any bulging capacitor? replace with top quality capacitor.

My T.V. did the same thing and it was due to bad capacitors on the power supply board. the tops of the capacitors were bulged, once replaced it worked fine. It involves sodering in new capacitors total cost $30. that includes buying the sodering tool. Keep looking around on line someone had pictures step by step how to do it.

There are several capacitors that are known, in Samsung TV's that go out.. ( I replaced mine until the board was burnt through.. bought a new board, they went out again.. BOUGHT A LG TV!!)
Samsung settlement warrants older TVs with faulty capacitors

Samsung LCD Plasma TV Capacitor Repair Kit Replacement Parts

replacing these is not hard at all.. if you can use a soldering iron, you can do it..it just takes time..

Repair Samsung LCD TV Relay Clicks Shuts Off Won Come On

WATCH THESE VIDEOS FIRST.

Samsung TV Won Turn On How to Repair Bulging Capacitor for Clicking Noise

My Repair of 46 Samsung LCD TV with Bad Capacitors