My screen is dead, where should I begin for repair?

My steam deck worked perfectly fine, and now my screen is "dead". I put it in quotation marks because I'm unsure how to successfully describe it. The screen remains black after being powered on (and charged). I can plug the deck into an external monitor and the game is there, so the deck works. Also, while plugged into an external monitor I can also use the touch screen and it is responsive, leading me to believe the screen itself is fine, there just is no picture. I have tried multiple different methods of resetting it and nothing has fixed the screen. Should I replace the screen or a cord? Any suggestions would be greatly appreciated. Thanks!