Hello Imran, First you can try to have help from support by opening a case on the https://support.ruckuswireless.com site. Your analysis should be good. This could be a PoE module fail or PoE Firmware issue. You can have a deeper look at this with the following command: show poe detail and looking for the Firmware version. If this indicates 0.0.0 version you can try to reload the PoE file to the switch. Cheers Vince
The correct command to show power is show inline power. Depending on your ICX version you may need to enable power on each port. In earlier versions the power was default off unless you enabled it on the port.
try this to enable poe on all ports of your 24 port switch