General Information

This chapter contains procedures for removing and installing customer- replaceable units (CRUs) and step-by-step instructions for upgrading your server system. When you disassemble any part of the server, note the orientation and placement of any cables or shielding that you remove.

!WARNING

The DC push button on/off switchs on the PCI modules do not turn off system AC power. Also, +5vdc is present on the system boards whenever the AC power cord is connected between the system and an AC outlet. Before performing any procedures that require the server to be off, first power off the DC by pushing the power on/off button. Make sure your system is powered off and the AC power cord is unplugged from the system. Failure to disconnect power before opening your system can result in personal injury and equipment damage.

!CAUTION

Operating your system with the access cover removed can damage system components. For proper cooling and airflow, always replace the access cover before powering on.

4-2 CRU Replacement and Server Upgrades

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NEC 320Lb-R manual General Information, CRU Replacement and Server Upgrades