Okay. SSH into the IAP with the issue and execute the following "show ap debug system-status | begin "Power Status" and paste the output into a reply.
IAP-277# show ap debug system-status | begin "Power Status"
Power Status
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Operational State POE-AT: No restrictions
----------------- -----------------------
Current HW State POE-AT: No restrictions
LLDP Negotiated POE Power 0.0W