iMessage and FaceTime not working on Mac

I should've noticed a few days ago when I sent a message and it didn't go through and I haven't been getting notifications for iMessage. Both apps have appeared to signed me out of my account and gone back to the initial activation page. When I sign in both apps just keep loading and my password is working on everything else, so I know I have the right one. Any suggestions?

 

I tried restarting it already, but I'll try your other suggestion. Also I let it keep loading all the way through and I'm getting a "Could not sign in. Please check your network connection and try again" message.

 

I tried creating a new account and that didn't work either. I'm going to see if I can log into my friends account, other wise I guess I'd have to use my backup?


Well his account couldn't log in either.

 

Took it to the Apple Store and they had to make the mac write the serial number on the logic board. I don't know why it wasn't written before or how it worked without it but that's what fixed it.