I have a 13" 2011 MacBook Air A1369 stuck on a grey screen. When I startup I can hear the chime and the computer proceed to go to a blank gray screen immediately. The screen has no Apple logo or loading bar.
What I have tried till now:
Booting in recovery by holding Command + R -- no effect, blank screen.
Booting in single-user mode by holding Command + S -- no effect, blank screen.
Booting in verbose mode by holding Command + V -- no effect, blank screen.
Booting in Safe mode by holding Shift -- no effect, blank screen.
Booting in hardware diagnosis mode by holding D -- no effect, blank screen.
Resetting PRAM by holding Command + Alt + P + R -- no effect, blank screen.
Resetting SMC by holding Shift + Alt + Control while pressing the power button, then pressing the power button alone -- no effect, blank screen.
Choosing another booting drive or recovery partition by holding Alt -- no effect, blank screen.
Is there something else I could try to get past this gray screen?