Television won't turn on, either by remote or pushing button on t.v. itself. light just flashes. worked fine last night

The status light flashes to signal that the power source is in protected mode. This mode has been activated by the protection system of the power source this morning, when you tried for the first time to start it. It has been activated because during the night a part inside the tv has failed and has started to act as a short.
The only way to fix that is to open the tv, test the power source, identify the power rail that is down and has triggered the protection system, follow the rail and test all components that are powered by it till you find the failed one then replace it or the whole board on which is situated.
To do this requires electronics experience, if you don't have it then call someone who has it. Or take the tv to a repair shop.