My iPad is stuck between the apple logo shown when turning on and the lock screen
My iPad is either on the apple logo, or on the lock screen. Although, on the lock screen, it is completely frozen, and I cannot "slide to unlock" or open Notifications or Control Centre. It just stays between those two, going from the lock screen, to a black screen, to the apple logo as if it's turning on, before it finally comes back to the lock screen again. Also, sometimes, the whole screen flashes blue for a second.
Hope you can help. Thanks.
iPad Air 1, iOS 8.something (unsure, sorry, and unable to check)
iPad Air