My iPad touch screen is not responding to touch. Can’t enter passcode. Can’t “slide” to power off. No case. Screen is clean. Fully charged and unplugged

Start here >>> If the screen isn’t working on your iPhone or iPad - Apple Support

If iPad isn’t responding, 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.

If iPad still doesn’t turn on, or if it gets stuck during start up, see the Apple Support article If your iPad won’t turn on or is frozen. Or if your iPad isn’t working correctly after you restart it, see the iPad Support website.