HP ProLiant BL20p Generation 4 Server Blade Maintenance and Service Guide

Removal and replacement procedures 22
• Keep electrostatic-sensitive parts in their containers until they arrive at static-free workstations.
• Place parts on a grounded surface before removing them from their containers.
• Avoid touching pins, leads, or circuitry.
• Always be properly grounded when touching a static-sensitive component or assembly.
Server blade warnings and cautions
WARNING: To reduce the risk of injury from high-current electrical energy, do not remove the
server blade access panel when power is applied through the HP ProLiant p-Class diagnostic
station. Remove all power from the server blade before removing the access panel.
WARNING: To reduce the risk of shock or injury from high-current electrical energy, do not
remove the server blade access panel while the server blade is installed in the server blade
enclosure. Do not remove the server blade access panel and then install the server blade into
the server blade enclosure.
WARNING: To reduce the risk of personal injury from hot surfaces, allow the drives and the
internal system components to cool before touching them.
CAUTION: When performing non-hot-plug operations, you must power down the server blade
and/or the system. However, it may be necessary to leave the server blade powered up when
performing other operations, such as hot-plug installations or troubleshooting.
Rack warnings and cautions
WARNING: To reduce the risk of personal injury or damage to the equipment, be sure that:
• The leveling jacks are extended to the floor.
• The full weight of the rack rests on the leveling jacks.
• The stabilizing feet are attached to the rack if it is a single-rack installation.
• The racks are coupled together in multiple-rack installations.
• Only one component is extended at a time. A rack may become unstable if more than one
component is extended for any reason.
WARNING: To reduce the risk of personal injury or equipment damage when unloading a
rack:
• At least two people are needed to safely unload the rack from the pallet. An empty 42U
rack can weigh as much as 115 kg (253 lb), can stand more than 2.1 m (7 ft) tall, and
may become unstable when being moved on its casters.
• Never stand in front of the rack when it is rolling down the ramp from the pallet. Always
handle the rack from both sides.
WARNING: When installing a server in a telco rack, be sure that the rack frame is adequately
secured to the top and bottom of the building structure.