Fujitsu SPARC M10-4 Service Manual page 303

Execute the diagxbu command to diagnose the crossbar cables.
XSCF> diagxbu -y -b 00 -p 02
Execute the showlogs command to confirm that the system is operating
normally.
XSCF> showlogs error
Incorporate the chassis, in which the PSU backplane unit requiring
maintenance is mounted, into the physical partition.
Close the rack door.
14.6.2 Inactive/Cold maintenance
Note -
Connect all the power cords to the PSU backplane unit of the chassis
requiring maintenance.
Note -
Return to the operation of the XSCF firmware replacefru command to confirm
that the chassis has been incorporated into the system.
Chapter 14 Maintaining the PSU Backplane Unit 279