The console service functions (65+21) are standard control panel functions that you can access using the control panel, Operations Console, or the Hardware Management Console (HMC). If the server is connected to an HMC, then you should use the HMC to perform console service functions (65+21).
HMC
The Partition Functions menu on the Operator Panel Service Functions window lists the available console service functions and the available control panel functions.
Operations Console
Console service functions can be entered using any of the remote control panel connectivity options that provide a graphical user interface in Operations Console.
Control panel
Console service functions (65+21) can be entered at the physical control panel if the system is not connected to an HMC.