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6 Replacing Parts
Safety Information
Follow the procedures listed below to ensure safe handling of components and to prevent harm to both you
and the server:
• Use an anti-static wrist strap and a grounding mat, such as those included in the Electrically
Conductive Field Service Grounding Kit (HP 9300-1155).
• Handle accessory boards and components by the edges only. Do not touch any metal-edge
connectors or any electrical components on accessory boards.
• Do not wear clothing subject to static charge build-up, such as wool or synthetic materials.
WARNING Hazardous voltages are present inside the server. Always remove AC power from
the CPU and other associated assemblies while working inside the unit. Serious
injury may result if this warning is not observed.
Service Tools Required
Service of this product may require one or more of the following tools:
• Electrically Conductive Field Service Kit (P/N 9300-1155)
• CE Peripheral Exerciser Disk Kit (45935-63210)
• DataComm Test Hood, 9-pin (24540-60010)
• DataComm Test Hood, 25-pin parallel (24540-60011)
• 1/4 inch Flat Blade Screwdriver
• ACX-15 Torx
®
Screwdriver
Replacing Power Supply Module(s)
The low voltage ON/OFF switch on the front panel controls the power supply.
CAUTION Power redundancy requires four power supply modules. No redundancy is available
with three modules.
If there are four power supply modules installed, the failed module may simply be removed without turning off
AC power. If only three modules are installed, and one module must be replaced, you must first turn off AC
power.
To replace the power supply:
1. Back up the hard disk drive(s) and save the configuration.
2. If necessary, shutdown the network operating system (see caution above).
3. Turn off the HP NetServer (if required; see caution above) and display.
4. Disconnect all telephone cables and power cords (if required; see caution above).