Macbook won't turn on, gray screen, what should I do?

Question

System administration

Tested:

After loading (apple and progressbar), it does not go anywhere beyond the gray screen.

(artifacts on the right have nothing to do with the problem - this is a dent on the lid)

Answer 1

1) This is not a dent, this is a matrix scribe
2) is there valuable data?
3) what screw is there?
4) what model?