Samsung plasma PN51F5300 turns on and off itself

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced

Hi Johnny,
Please take out the main board, keep it immersed in mild liquid detergent solution for some hours, rub it thoroughly with a tooth brush, wash it with clean warm water, dry it thoroughly with hair drier and fit it back. Hope it works. It has done the trick for me several times.
Good luck.

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I would suspect a problem with x main board or circuit. I would start with checking the connections on the x main board?

I will presume it is a Plasma as indicated here----lines top/bottom or left right are not easy to fix as far as knowing what to replace.

Set has a main board that communicates with the screen and directs information there--can be in one of three general areas:

1. Main Signal board (most likely)

2. Power supply as voltages are critical (less likely)

3. Display panel (the screen unit itself with a defect inside it) the last is least likely but possible.

Good day!!!!


You have a better chances if you have failing bad capacitors on the power supply board...


bad capacitors sometimes bulged on top,sometimes not...if the caps is bulged you can easily identify it..







Thanks for using fixya..

The tv main Tuner signal board have intermittent problems,sorry this problems it could be anythings wrong in the board as parts wise are dying in the tv Tuner signal board just not completely,that why it take times to show up,that the board where the tv incomming broadcasting signal cable plug into it.U can take things aparts and putting it back together again?Yes.Try website like Ebay.com to buy a refurbish main Tuner signal board for the replacement.Or take to the shop for the repair that it.

Tries tv unplug,replug tv back about an hour later.By letting tv resetting itself back to the factory setting.Now the tv should be working again.If still have the same problems.The power supply board is the causes and the problems.That the board,where the power a/c cord plug into it.Try website like Ebay.com to guy a whole refurbish power supply board for the replacement.

It related Power board or Y-main board problem.
You need to replace one of aboves.

Remove the power supply cable to Y Main board, check Vs on power supply board when you turn on tv.
1. If you have normal Vs, replace the Y Main board. If still not work, replace the Logic board.
2. If you don't have normal Vs when you try to turn on your tv, just replace the Power Supply board.