Try these troubleshooting steps before sending your PS4 system in for service.
Visit https://support.us.playstation.com/ and search for answers to some issues.
Visit https://www.youtube.com/watch?v=yU2Z6alUAcI if your PS4 system beeps unexpectedly or if it ejects discs unexpectedly.
Visit https://www.youtube.com/watch?v=zuiHbVPrBck for Getting System Service video.
Visit http://us.playstation.com/support/systemupdates/ps4/new-install/index.htm to erase all system data and reinstall system software.