AP C9115AXI-E not joining controller after AP/Switch Reboot

[Gallivare]

Was working fine up until a few weeks ago.

Controller: Cisco Catalyst 9800-CL Wireless Controller Running version: 16.12.5 Full AP Bootsequence via console: https://pastebin.com/raw/K1ZurPs6

[Scott Fella]

What else have you done to troubleshoot?  If you rebooted a switch and then the ap never joined, did someone not save the config prior to the reboot?  Have you verified the port configuration and that the ap is getting an ip address?  Your best bet is to console into the ap, reboot that ap and look at the output.  That will show you where its failing.

Troubleshoot Catalyst 9800 AP Join or Disconnection Issues Flow - Cisco

[marce1000]

 - Have a checkup of the 9800-CL Wireless Controller's current configuration with the CLI command : show  tech   wireless , have the output analyzed by  https://cway.cisco.com/tools/WirelessAnalyzer/  , please note do not use classical show tech-support (short version) , use the command denoted in green for Wireless Analyzer. 

 M.

[Rich R]

1. Make sure the AP has enough power
2. I don't see any attempt to join a controller - what discovery method are you using? 
3. You may have hardware failure (AP critical) - in which case RMA