• No sign of a fix.

    It's on a blank screen and is in a loop of playing the startup sound and silent for 15 seconds and repeat... bong... bong... bong...

    Internet recovery (option + command + r) hasn't succeeded, that gets stuck in it's own loop of "Enter WiFi details" > downloading, time remaining 0:03 > blank screen > "Enter WiFI details".

    Occasionally internet recovery answers with -2100F or something similar, but that's the only exit from the loop it gets in.

    If I fire up normally... bong... bong... bong...

  • What about not internet-, but regular recovery mode ([cmd] + [r] on startup, release when the apple shows)?

  • Recovery mode doesn't work... never arrives in the recovery menu as it loops the startup sound after the initial Apple logo disappears.

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