HP 9000 rp8420 Server - User Service Guide, Fifth Edition

5. Use the MP Command menu PE command to power off the hardware component.
Using the PE command, you can power on or off the cabinet (including all cells and I/O in
the cabinet), individual cells along with their associated I/O domain, or PCI power domains
(bricks).
Using the Command menu PE command to manage cabinet power is equivalent to using
the front panel power switch.
6. If you need to disable all power in the entire cabinet, you also must disconnect all power
cords to disable all housekeeping power.
IMPORTANT: Because of power redundancy capabilities, it is important that each power
cord plug into its proper receptacle. Label all power cords to indicate into which receptacle
each cord plugs. Ensure that the cabinet power has been turned off before disconnecting
any power cords.
7. Perform the hardware removal and replacement procedure for the powered off component.
Powering On the System
To power on the system after a repair:
1. If needed, reconnect all power cords to the appropriate receptacles and power on the system.
2. Use the MP Command menu PE command to power on the hardware component that was
powered off and replaced.
3. Use the PS command to verify that power is enabled to the newly replaced part. For example:
Enter Cfrom within the PS command to select cell.
If power is absent from the part, enter the PE command and select T to power on the entire
cabinet.
NOTE: You may need to allow time for some components to complete power on self test
(POST) before a complete status is available.
4. Reboot each nPartition. See Appendix E “Operating System Boot and Shutdown”.
5. Verify system functionality by using the On-line Diagnostic Support Tools Manager (STM)
exerciser.
Removing and Replacing Covers
It is necessary to remove one or more of the covers to access many of the FRUs within the HP
9000 rp8420 server chassis.
104 Removal and Replacement