Black screen with audio. Roku tcl

I have a 55 inch TCL Roku smart tv and recently when I turn it on it won’t show any visual. I can still hear audio but the screen is just barely lit. I have tried the flash light test but haven't seen anything with it so I'm not sure if I'm doing it wrong or not. When this first started if I waited a few minutes the screen would pop up but it no longer does. I've tried resetting it but as I can’t see the screen I can’t even continue with that. The tv is just over 2 years old.