试试ChatGPT给的方法

1. Force restart (hard reboot)

This usually fixes freezes/crashes. The method depends on your iPad Air model:

• iPad Air without Home button (newer models with Face ID / Touch ID in power button):

  • Quickly press and release the Volume Up button.

  • Quickly press and release the Volume Down button.

  • Press and hold the Top (Power) button until you see the Apple logo.

• iPad Air with Home button (older models):

  • Press and hold the Home button and the Top (Power) button at the same time.

  • Keep holding until you see the Apple logo.

2. Charge the iPad

• Plug it into a wall charger (not a computer USB port) and leave it for at least 30 minutes.

• Sometimes a drained battery combined with a freeze makes it look “dead.”

3. Check for screen/backlight issues

• When charging, see if the screen shows a charging icon.

• If the screen stays black but you hear sounds or feel vibrations, the display might be the issue.

4. Use Recovery Mode (if still not starting)

If a force restart doesn’t work:

• Connect the iPad to a computer with iTunes (Windows/macOS Mojave) or Finder (macOS Catalina and later).

• Force restart again, but keep holding the buttons even after the Apple logo, until you see the Recovery Mode screen (a cable pointing to a computer).

• Then you’ll get options to Update (recommended first) or Restore.

"Update" tries to reinstall iPadOS without erasing data. "Restore" wipes the device.