Hi Pradeep,
Thanks for your response.
The previous version was 15.1X53-D57.3.
Below the output from "show chassis firmware detail".
This is from the switch that is showing no poe controller:
> show chassis firmware detail
FPC 0
Boot Firmware
U-Boot U-Boot 2016.01-rc1 (May 23 2016 - 08:45:58 -0700) 1.2.0
loader FreeBSD/armv6 U-Boot loader 1.2
This is from the switch that is showing the POE controller as "Device Fail":
> show chassis firmware detail
FPC 0
PoE firmware Unknown
Boot Firmware
U-Boot U-Boot 2016.01-rc1 (May 23 2016 - 08:45:58 -0700) 1.2.0
loader FreeBSD/armv6 U-Boot loader 1.2