Grey screen appears with a flashing question mark folder

When I turn on my mac book a grey screen appears with a flashing question mark folder. If I hold down the option key when I turn it on I get place my wifi password in and click on an arrow for Internet recovery. After 1 or 2 seconds,

apple.com/support

-6003F

appear. There is a globe with colon symbol.

Need help to resolve this problem. Anyone please help me.