HP RP7405/7410 User Manual page 82

Removal and Replacement
Shutting Down nPartitions and Powering Off Hardware Components
Step 9. Use the MP Command menu's PE command to power on the hardware component that you powered
off.
Step 10. Use the MP Command menu's PS command to confirm the status of the newly replaced component.
NOTE
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You may need to allow time for some components to complete power on self tests
(POST) before a complete status is available.
Chapter 4