I'm having a problem with Blender after a recent GPU crash. While rendering a moderately intense scene in Cycles, my computer locked up and I had to do a hard shut-down. Ever since, Blender's LookDev mode has only shown me a grey screen. I can 'see' the edges of my plane, but no other details, no textures or materials. Lighting does not work at all for me in this mode. Eevee also does the same thing in either LookDev or Render modes, with even more broken results sometimes in the form of reflective artifacts.
I have tried importing my scene into a new file. I updated to a newer version of Blender, and I also re-installed my graphics drivers. None of these gave any improvements. I am at a loss and a bit of a wall, as I am having a hard time working on my file without LookDev mode. Any and all help is appriciated.
Scene shown in Solid View mode with random colors.

Scene shown in LookDev mode, grey screen with some edges barely visible.
