So my LCD Steamdeck suddenly decided to.go Black screen.and not boot up. I don’t get a chime or anything.

Now I can get to the boot manager or bios with the +/- power button sequence BUT everything is frozen when I get there. Can’t scroll…pushing A does nothing…can’t make any selections. All I can do is shut it down by hitting the power button.

Tried many times and all I get is bios selections but no way to select them!

Help!