Macbook air Prohibition sign

[muaaman]

If nothing is pressed soon, pressing the power button leads to a grey screen with a prohibition sign on a Macbook Air 13'' running Mountain Lion.

Attempt 1: Pressed Command+Option+R

Internet recovery on compatible network -> leads to this error:

apple.com/support
-3400F


Attempt 2: Pressed D

Internet recovery on compatible network -> leads to this error:

apple.com/support
-3400D

Attempt 3: Pressed Command+R

Prohibition sign.

Resolution input would be greatly appreciated.

 

[MacInWin]

Please read the link in my sig and post again. From what little you've said, you've lost the hard drive.

 

[MightyGem]

The prohibition sign means that the computer can't locate a startup disc. Try powering on while holding down the Alt key and see if the MacintoshHD disc shows. If it does, try selecting it and see if the Mac boots.