ipad screen is flickering

If you have a hardware fault, this may not help - but your first action to clear an unexpected or isolated issue is to force-restart the iPad:

• 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 an iPad with Face ID: 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 this doesn’t resolve the problem, your next best step is to seek advice from Apple Support. The Contact Support link is at top-right of this page.