Have TV Questions? Ask a TV Technician
Hello, Sorry you're having problems. This is happening because the Mainboard in the set has prematurely failed. This is the most common failure with Samsung sets and the symptoms are that the set will continue "cycling" on and off (the Mainboard provides the turn on/off commands to the set.
In most cases this requires replacement of the Mainboard to fix the issue (which is something that I can help you with).
However it's worth it to try a hard reset, as sometimes the processor in the TV can simply have locked up.
The first thing you would try, is disconnect the set from power, then press and hold the power button on the TV itself (not the remote), for 10 seconds and release. Then plug the set back in, and also check that the power cord is connected tight at the TV as well. Press power once, and see if the set powers up normally. Try this procedure up to 2 times, and please let me know what happens.
Are you still having the same problem please?
I'm unsure why you're unable to reply, but if you're having the same issue, then the board that needs to be replaced is called the "Mainboard" and is available at the link below for your set if you ant to DIY repair it:
The board is "plug and play" - meaning no soldering or special tools are needed to replace it. Howver the back of the TV must be removed to access it.
Alternatively, if this is not something that you're comfortable with, then a shop will typically charge $300 parts and labor on this model to replace the Mainboard and can be located using the link below:
Other than that, I'm sorry for the bad news here and wish there were a quick fix.
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Do you need further assistance with this?