Apple logo then red screen then off and then repeats
on iPad pro Apple logo then red screen then off and then repeats
iPad Pro, iPadOS 15
on iPad pro Apple logo then red screen then off and then repeats
iPad Pro, iPadOS 15
Hi dge5,
You started from a great resource: If your iOS or iPadOS device restarts or displays the Apple logo or a spinning gear unexpectedly
If your iPadOS is fully updated, test the steps for force restarting below found in the article here:
"On your iPad without a Home button

4.If your iPad doesn't turn on, follow these steps to check your hardware and charge your device. You might need to charge for up to an hour.
5.If your iPad still doesn't turn on, contact Apple Support."
If the issue continues test creating a backup of your information: How to back up your iPhone, iPad, and iPod touch
If unable to the steps here are for restoring from recovery mode to test: If you can't update or restore your iPad
Reach out to Apple Support directly to further assist if you're still seeing the issue.
Contact Apple for support and service
Best.
Apple logo then red screen then off and then repeats