HP MSA 30 User Manual page 39

Replacing System Components
9. If power was disconnected in step 3, reconnect AC power to the system.
10. Observe the I/O module LEDs to confirm that the module is functioning
properly.
3-8
CAUTION: To prevent damage to the cable connector, do not use excessive
force to tighten the thumbscrews on the connector.
HP StorageWorks Modular Smart Array 30 User Guide