Hello Dell communities, I don't know what happened and how to go about it. I switched off my Dell LATITUDE 3330 all for me to switched it on and see it displaying 

"Intel(R) Boot Agent GE v1.5.50

Copyright (C) 1997-2013, Intel corporation 

PXE-E61: Media test failure, check cable

PXE-MOF: Exiting Intel boot agent

No Boot Device Found. Press any Key to reboot the machine"