Hi @Eduard24 so you are not able to turn the Tv on at all? Have you tried unplugging from mains for a few minutes to see if that makes a difference. Are your connections secure,could try disconnecting/reconnecting the the cables. If by any chance you are using a surge protector sometimes there can be an issue there. However if it a continuous flashing red light would tend to indicate a more serious problem. See some information here https://www.samsung.com/uk/support/tv-audio-video/my-tv-wont-turn-on/
You may need to contact Samsung support though as it is a 2017 model a repair may not be viable.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
