Service manual

Chapter 6 Replacing Parts
97
Replacing VRMs
You may choose to swap out a VRM (voltage regulator module) in the process of troubleshooting processor
problems.
1. Log off all users and if necessary, back-up files.
2. Follow instructions in your network operating system (NOS) documentation to gracefully shut
down all networking software and applications.
3. Press the power switch on the HP NetServer's control panel when prompted by the operating
system.
4. Disconnect the power cables.
WARNING The power supplies will continue to provide standby current to the NetServer until
the power cable is disconnected.
5. Gain access to the HP NetServer by referring to Replacing the Bezel and Replacing the
Covers.
CAUTION Wear a wrist strap and use a static-dissipating work surface connected to the
chassis when handling components. Ensure that the metal of the wrist strap
contacts your skin.
6. Identify the VRM location.
Secondary
Processor
Module
Socket
Primary
Processor
Module
Socket
Secondary
VRM
Socket
Primary
VRM
Socket
Front of
System
VRM Locations
7. Pull the connector latches to the side and lift the VRM upwards.
CAUTION Do NOT pull on the VRM heat sinks. Grasp the module by the edges of the PCB
(printed circuit board).