Continuos Boot Error on Joining AIR-CAP2702I-K-K9 to AIR-CT5508-100-K9

[Translator]

Hi, I'm a beginner engineer.

I'm trying to join a new AP to WLC since the existing AP is defective at the place where I'm currently in charge of maintenance. 

In this way, an image download fail appears, starting an infinite reboot.

According to what I've found in this regard, 

https://www.cisco.com/c/en/us/support/docs/wireless/aironet-700-series-access-points/218447-ios-ap-image-download-fails-due-to-expir.html

This is a post, and I wonder if the AIR-CAP2702 model can also be solved by following the method in the link.

And I also wonder if there will be any issues such as disconnecting the APs currently in service if I manually change the time after disabling NTP from WLC as explained in the link.

[Haydn Andrews]

Take a look at https://www.cisco.com/c/en/us/support/docs/field-notices/639/fn63942.html

it appears the certificate has expired 

Follow the instructions in the field notice to get it to join