Repaired Screen, Now Black, Backlight Visible

Just replaced the screen on a Nintendo Switch Lite. Everything fits together properly, but now when I try to turn it on the screen glows black then cuts out. If I hold the power button, the backlight flashes, it turns off, then cue issue again. All the connections are solid, and it’s a new screen. I don’t remember where I got it, but I hope it’s not defective.