Nortel Networks 400 4.0, BCM200 manual Prepare for maintenance overview, Shut down the system

230Chapter 20 Preparing hardware for maintenance or upgrades

Warning: Maintain a current backup of your system

When you replace the hard disk, you must restore the BCM system programming from the backup.

Caution: Do not use an electric or magnetized screwdriver near the hard disk. You can lose the information stored on the disk. Shock can damage the hard disk. Do not drop or hit the hard disk drive.

Warning: You must remove all of the connections to the BCM base function tray before you power the system down. Failure to disconnect lines before power down can cause damage to the system.

Warning: Protect the hardware components against damage from electrostatic discharge. Always wear a grounded wrist strap before you handle components. Always place the components in a static-free container.

Figure 104 provides an overview of the process for preparing the BCM system hardware for maintenance or upgrade procedures.

Figure 104 Prepare for maintenance overview

Shut down the system

Disconnect cables from the front of the main unit and expansion unit

Remove AC power plugs from both units

Remove from rack or wall. Place on

static-free surface

Remove the top from the unit

Perform maintenance/ upgrade procedure

Restore power to the units

Reconnect cables to the front of the units

Test system functions

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