"The TV switches off unexpectedly.
? If the lamp door is opened, the TV will shut down. The TV is designed not to operate when the lamp door is ajar.
? If a red light is blinking on the front of the TV, the set has entered protection mode. Unplug and plug the set back in a couple of
times and try to switch it on. If the problem persists, contact the Customer Care Center at 1-800-531-0039."

You didn't tell if the red led is blinking but here's the number from the manual in the US.
Bob