See Release the CMA.
Do not allow the CMA to hang unsupported while it is unattached.
You will hear an audible click when the power supply is fully seated.
For instructions on reconnecting the CMA see Attach the CMA to the Server in SPARC T8-1 Server Installation Guide.
Service Required LED on the power supply
Front and rear Service Required LEDs
Rear PS Failure LED on the bezel of the server
See Interpreting LEDs.