Brand new Ipad could not be updated with 14.3, error code 4000
My brand new Ipad is not updating with 14.3, getting error code 4000
iPad, iPadOS 14
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This support page makes reference to 4000-series errors:
If you see error 9, 4005, 4013 or 4014 when you restore your iOS device – Apple Support
Whilst Error #4000 is not explicitly listed in this support page, Apple Support are known to recommend that you follow these steps when troubleshooting this error - prior to seeking further assistance from Apple Support.
Apple Support can be contacted directly using the Contact Support link at top-right of this page - or by using the excellent Apple Support App. If the App is not already installed, it can be downloaded from the App Store: