In a similar boat. Bought mine early 2020. Have not put that many hours on it and randomly my evf went white screen. Opposite of yours. When I look into it it’s like looking into a flashlight. Very disappointing to say the least.
Well now I can tell you you’re not the only one. I went to an event tonight and it happened to my evf. It’s completely blown out. Please tell me you’ve figured this out.