I have installed a new Stack of Catalyst Switch 3750X (2x WS-C3750X-24T-S).
Network Lan works good by I think to have a cosmetic error:
FAN 1 is OK
FAN 2 is OK
FAN PS-1 is OK
FAN PS-2 is NOT PRESENT
Both fans of couple of Switch work good with green led.
Can you confirm my impression?