I have a Samsung UN55J6200AF that will no longer turn on. The TV would flicker when we would shut it off. Now the TV won't turn on at all.

Your TV has stopped working here and has died too.

Hi Ashley....Chances are your LED backlights need replacing, if you see a flash then black screen some of the lamps are shorted and the current draw is too high, and the protection circuitry is shutting down the inverter. You can check to be sure the main is working by testing the backlight on pin on the plug that goes from the main to power board, you need to see 3.3 vdc on that pin when you power the set on and it needs to stay at that voltage or you have main board issues

Hello Loveleen, ask, does the TV turn on and do not give you an image or sound, or does it just not turn on?
As far as you know, you could have problems with the power supply board that feeds the rear lighting of the LCD panel and / or the main board, which governs the entire TV
I advise you, go to a specialized technical service
I hope you can solve the problem and soon you keep enjoying your Samsung TV
Greetings Franco Dosil

Hola Loveleen, pregunta, el televisor prende y no te de imagen ni sonido, o simplemente no enciende?
Por lo que cuentas, podr?as tener problemas en la placa de fuente de alimentaci?n que alimenta la iluminaci?n trasera del panel LCD y/ o la Placa principal, que gobierna a todo el televisor
Te aconsejo, te acerques a un servicio t?cnico especializado
Espero que puedas resolver el problema y pronto sigas disfrutando de tu TV Samsung
Saludos Franco Dosil

http://org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx?CDSite=US&CttFileID=6054697&CDCttType=UM&ModelType=C&ModelName=UN55J6200AFXZA&VPath=UM/201504/20150407095631744/ENG-US_NMATSCJ-1.103-0330.pdf

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

um make sure you ask a tv retailer before u ask us ok

Listed as a laptop--if a TV is a Samsung or what?

Hi replace the fuse in the wire connecting the mains plug. It's generally located within the 3 pin plug.
If you are lucky it maybe just a fuse blown out.
Thanks

I would suggest to call Samsung to get the Plasma repair under manufacturers warranty. The flickering will not go away until the hardware failure is corrected.
Good Luck.