When I decided to un-jailbreak my iPad and remove Cydia, I did a “Erase all Content and Settings” via the Apple Settings App. This however caused the iPad to no longer boot. Apparently it erased lots of data, but it did not restore some of the boot processes.
On a Cydia jailbroken iPad, there are two bars of pixled colors during the boot apple screen. These were present on the boot screen after I erased all the content. Eventually the iPad boot up sequence would time out and the iPad would reboot and fail again. I had effectivly bricked my iPad.
Digging around in google didn’t really provide much guidance. I did finally find a document provided by apple which provides instructions on how to restore a backup from iTunes.