Screen shuts down

By “shuts down” are you suggesting that your iPad reboots (with the Apple logo), or that the iPad locks and you are simply challenged for your Passcode? Something else?

With the benefit of more information, contributors here may be able to provide more insight and appropriate guidance. This user tip, authored by a senior contributor here, may help you to describe the problem in more detail:

Writing an effective Apple Support Commun… - Apple Community

Assuming that you’ve not already done so, try a forced-restart of the iPad - as doing so will very often clear an isolated software or performance issue:

• 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.

Get support now by phone or chat:

• Call Apple Support at 1-800-APLCARE.
• International Support.
• Contact Apple Support.
• Chat using Messages.

You’re very welcome. A forced-restart will cure many issues 🙂