Total stab in the dark here, but it could be the local time on the device. Your local clock needs to be relatively close to the actual clock. I've run into this more than a few times with an old Surface Tablet I seldom use. Powered off/battery dead, clock gets out of sync. Power on, cannot get online because everything is TLS/SSL now, even clock sync. Cannot even sync the clock, because of certificate issues. Manually set the time to approximately correct time has resolved my issues with long powered off devices. That is, assuming of course, the _ability_ to set the time on the device.