Power On From GUI/CLI Is Allowed, Yet Doesn't Work, With Keyswitch Turned to Off (BugID 4524277)

If the system's state changes from battery power to standby power and the keyswitch is in the off position, the RSC software should generate a warning that you cannot turn the system power back on when you issue a poweron command from either the CLI or the GUI. The RSC software should issue this warning. You need to move the keyswitch back into the on position.

If this happens, use the resetrsc command.