If you're not able to get your TV to power on, try unplugging the unit for a few minutes and then plug it back in and attempt to restart the unit. If it still isn't able to power up, you may need to call the Samsung customer service center in your area for further assistance.
It's rare that a firmware update properly installed would cause an issue like this, but it's still possible.
Keep me posted.
I have a problem with my tv. I tried to update the tv software, everything was ok, the update was succesful, on screen appears the following mesage: "Update completed succesfully. Your tv will turn off after 3 sec. after that will turn on automatically". After this the tv turned off but not turned on. The red light is flashing and flashing, no sound or picture. Can you please help me to can turn on my tv?