While all good suggestions, it’s usually a bad material or missing reference that throws everything off. Best way to troubleshoot is to start by Overriding materials. Do you know how to do that?
If that doesn’t work, you could try turning layers off one at a time (your model looks small so shouldn’t be that difficult). That way you the problem component or material should show itself. Check the File Path Editor as well to see if anything looks out of the ordinary. Let us know if any of these tricks work.
