What is flashing question mark on screen mean?
Error code4H00/11/40000000:SATA(0.0) then a flashing question mark what might have happened can’t reboot . MacBook Air 2012
Error code4H00/11/40000000:SATA(0.0) then a flashing question mark what might have happened can’t reboot . MacBook Air 2012
A flashing question mark or globe appears when you start your Mac.
The error code suggests the HDD may be failing. Since this appears to be a hardware problem: Make an appointment at the Apple Genius Bar for service. If you need to find an Apple Store - Find a Store - Apple.
It means that your Mac can not locate the files it needs to boot. Possibly corruption, possibly a hard drive failure. Boot into Recovery (if you can) and run Disk Utility from there.
What is flashing question mark on screen mean?