The screen just went dark

@oauho1qked4nakk you mentioned that "Everything else is working fine" which let's me assume that you still have audio. If so, turn the TV to a channel where you can hear the sound. Next, use a flashlight and shine the beam at an angle against the screen. Do that in a darkened room. See if you can make out shadows or shapes. If you do, then it is your backlight that has failed.

If you do not see anything, unplug your set and remove the back cover. Then visually check the boards for any obvious damaged components. Check all the wiring and unplug the wires and plug them back in, make sure they are properly seated. Post some images of all of your boards with your question. Use this guide Adding images to an existing question for that so we can see what you see. It is possible that this is either a power board (less likely) or a T-con board issue (most likely).

Of course you also want to check your ribbon cables as well as your HDMI cable etc. You can also try to power cycle. Turn your TV off and disconnect all of the inopus and peripherals connected to your TV. Now press and hold the power button for 30sec-60sec. and wait a bit. Then reconnect only your power source as well as one video input. Try your TV again and see if that resolved any software issue.