Please forgive me if I have posted in the wrong area, missed a solution somewhere and/or have not explained anything correctly/clearly.
My Nexus 7 (2012) (I installed Cyanogen on it (and updated it once) through their installer and it has run perfectly for months) started rebooting randomly one morning. I turn it on and it seems to be normal, then it will suddenly reboot. The time between reboots varies ranging from 30 seconds to a few minutes. I can not install or update any apps and any settings changed are reset back to what they were previously upon reboot. I have tried a factory reset and while it appears to wipe everything (all caches and data) when I reboot it is the same as before the reset (I also receive this message (after all other processes are complete) during the data wipe "E: unknown volume "/sdcard/.android_secure" "). I am able to turn on developer options but then the random reboot occurs and it is turned off. I have plugged it to my computer and see it listed, but can not access anything on it.
My intention is to wipe it using my computer (fastboot?) but I am at a standstill due to the rebooting and being unable to turn on developer options.
Any ideas or suggestions would be greatly appreciated.