HP rp7420, Service Manual, Page: 84 / 127

Installing and using the system in strict accordance with HP's instructions minimizes the chances
that the system will cause radio or television interference. However, HP does not guarantee that
the system will not interfere with radio and television reception.
Take these precautions:
• Use only shielded cables.
• Install and route the cables according to the instructions provided.
• Ensure that all cable connector screws are firmly tightened.
• Use only HP supported peripheral devices.
• Ensure that all panels and cover plates are in place and secure before system operation.
Electrostatic Discharge
HP systems and peripherals contain assemblies and components that are sensitive to ESD. To
prevent component damage from static electricity, carefully observe the precautions and
recommended procedures in this manual.
CAUTION:
Connect to ground with a wrist strap. Connection can be made to any grounded
metal assembly in the cabinet. Both you and the electronic devices must be grounded to avoid
static discharges that can cause damage.
To prevent component damage from static electricity, take these precautions:
• Prepare an ESD-safe work surface large enough to accommodate the various assemblies
handled during the upgrade. Use a grounding mat and an anti-static wrist strap, such as
those included in the ESD Field Service Kit, Part number A3024-80004.
• The anti-static bag cannot function as a static dissipating mat. Do not use the anti-static bag
for any other purpose than to enclose a product.
• Treat all assemblies, components, and interface connections as static sensitive.
• When unpacking cards, interfaces, and other accessories that are packaged separately from
the system, keep the accessories in the conductive plastic bags until they are ready to be
installed.
• Avoid working in carpeted areas, and keep body movement to a minimum while installing
accessories.
Powering Off Hardware Components and Powering On the Server
When you remove and replace hardware, you may need to power off hardware components as
part of the remove and replace procedure.
This section gives details on how to power hardware components off and on.
Powering Off Hardware Components
To power off individual components or the entire cabinet, follow these steps:
1. Log in to the MP of the server.
2. If the component you will power off is assigned to an nPartition, then use the Virtual Front
Panel (VFP) to view the current boot state of the nPartition.
You must shut down HP-UX on the nPartition before you power off any of the hardware
assigned to the nPartition.
When you are certain the nPartition is not running HP-UX, you can power off components
that belong to the nPartition.
84 Removing and Replacing Server Components