The same exact thing happened to me. No joke, seriously just try hitting the top of the ps4 like twice a little hard but not that hard to cause it to break or anything. It worked for me and I tried looking for a way to fix it on the Internet but it just talked about the "Blue light of Death" and that's not what I have. I found no other solution and I tried everything but sometimes consoles and other electronic devices need "a little hit" to work.