Hello, Mike has left the conversation, but I will be glad to help you. There are only two possible causes for the blinking light on the front of the TV- one is a hardware failure and the other is a simple lockup.
Please follow these steps and see if anything changes.
1) Disconnect the TV from power, then press and hold the joystick controller for 10 full seconds and release (this discharges residual current from the TV).
2) Plug the TV back in and press the joystick once to see if it will power on.
3) If this does not work, try those steps up to two more times in the effort to force a reboot of the set.
If none of the above steps bring up the Samsung welcome screen, and/or if the light is still blinking, then this is a hardware failure within the TV that would require attention through Samsung under warranty. Since the set is under one year old, you would need to contact Samsung directly at the number below and start a repair ticket on the set:
Other than that, I'm sorry for the bad news and wish there were a quick fix.
If you need further assistance let me know. Please do not forget to click the 5 STAR RATING, at the top of the page for my efforts. It is my livelihood and you can follow up at any time if needed.