My screen is frozen. Nothing works to turn off or try to reset. Says Accessory is not supported by this device.

iPad frozen: Try a "forced" restart of your iPad, using these instructions:

• On an iPad with a Home button: Press and hold the top (power) button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On other iPad models: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top (power) button. Only when the Apple logo appears (it might take 20-40 seconds), release that button (ignore all other screens that might appear).

Accessory not supported:--> If you see an ‘Accessory may not be supported’ alert - Apple Support

If the issues persist, contact Apple Support, using this link:--> Get Support

Regards

Giulio

Are you using an Apple Smart (folio) keyboard? If so, try removing the keyboard from the iPad.

This alert is typically characteristic of a faulty folio keyboard. The electrical connections that pass though the flexible fabric hinges typically fracture - this usually resulting in errors and/or the on-screen notification that you see.

The Smart folio keyboard is not repairable. The only remedy is replacement of the keyboard.

With the keyboard removed, if the iPad remains unresponsive, do one of the following:

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On other iPad models: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.