Catalyst 3560 Loses Connectivity When AP is Connected

[navydivervet]

Using two Cat 3560's as access switches, with uplinks to Cat 9300 stack of two. Connecting a single AP to each 3560. Connectivity is ok with 1 AP connected. But, when the other AP is connected (to a different 3560), that device loses connectivity on all interfaces. I'm baffled...

Is anyone aware of a bug, or cause to make all ports lose connectivity when a single AP is connected?

I didn't have remote access, so couldn't view the logs or do any testing at the time. I'm sure it will be more clear once I can do so

[MHM Cisco World]

are you sure that AP not make Loop?
are you config any L2 security in interface connect to AP ?
port-security with AP and L2 roaming make issue. please share the config of interface.

[balaji.bandi]

what is the logs show, does the switch reboots ?

Do you have enough power for AP to power up ?

[Leo Laohoo]

What is the configuration of the port? 
Is that port incorrectly configured for an Etherchannel?