Screen is frozen, it won't allow any action such as "slide to unlock

Question

My screen is frozen, it won't allow any action such as " slide to unlock. When double tapped, a screen with "enter passcode" appears but passcode cannot be entered.

Answer 1

That is very unfortunate. When you connect it to your computer, will it sync with iTunes?
If your iPad will sync with iTunes, I suggest that you backup your iPad with iTunes, then proceed to do a software restore. To do a software restore, plug your device into your computer, click on your device in iTunes, then under the general device information (a picture of the device with the name, etc) is a button that says 'restore'. This will wipe all of the software off of your device (as well as all your apps and files, which is why you backed them up), including, more than likely, the software issue with not accepting user input.
If that does not work, power the device down into DFU (Device Firmware Update) mode. Here are the steps for putting your device into DFU mode:
1.) Plug your device into your computer
2.) Hold the power and home button down for 10 seconds
3.) After ten seconds, let go of the power button but continue holding the home button.
4.) Stop holding the home button once iTunes recognizes the device as being in 'recovery mode' (really DFU mode in this case).
If still that does not work, it is most likely not a software issue, but a hardware issue. The way the iPad 'touch screen' (truly a digitizer) works is that you are not really touching the screen (LCD) of your device, but instead a front plate (the digitizer) which detects touches, interprets them, and tells the CPU of the iPad where touches occured, so that the iPad can then calculate what was at that location, etc.
The way it transfers this information is that it has a small cable leading from one corner of the digitizer to a port on the inside of the iPad, the same way the iPhone, iPod Nano (multi-touch version) or iPod Touch works. Opening the iPad to check for this cable can cause damage to the digitizer, damage to the internal components to the iPad, and will certainly void your warranty. If none of the software restores do the job, I would suggest taking it to your nearest Apple Store (or sending it to Apple if you do not live near an Apple Store) to have the hardware digitizer component replaced.