I just tried to update my Nexus 9 from Android 7 to 7.1 Unfortunately the system now seems to be in an endless loop of "Google" screen and black screen (maybe rebooting?) Goes on for hours, nothing happens... So far i found out this was a big issue back then for the Android 6 Update - and sometimes the system was that fucked up, that the only solution was sending it back to the retailer... Didn't find anything about the same problem with 7.1 - and i hope Google didn't repeat its big mistake here??? Would be happy about any help or tips :(
Applying "Rescue OTA for my Nexus 9 using Windows 10 on my laptop" works. But one must follow the instructions very carefully, and if need be, download the needed Android software to your laptop. I have to admit it took 3 or so tries but perseverance paid off. Thank you to whomever posted the 2 page step by step instruction solution. Needless to say my Nexus 9 was to valuable to me to be left stuck on the Google Logo.