Compaq PROLIANT ML350 - Manual (Page 18)

Removal and Replacement Procedures
2-4 Compaq ProLiant ML350 Generation 3 Server Maintenance and Service Guide
COMPAQ CONFIDENTIAL Codename: Steel Dragon 2.4 Part Number: 278704-002 Last Saved On: 12/18/02 9:43 AM
Preparation Procedures
WARNING: Only authorized technicians trained by Compaq should attempt to repair
this equipment. Because of the complexity of the individual boards and subassemblies,
no one should attempt to make repairs at the component level or to make modifications
to any printed wiring board. Improper repairs can create a safety hazard.
CAUTION: Electrostatic discharge (ESD) can damage electronic components. Be sure that
you are properly grounded (earthed) before beginning any installation procedure. Refer to
“Electrostatic Discharge Information” earlier in this chapter for more information.
Before removing any serviceable parts, determine whether the part is hot-pluggable or
non-hot-pluggable.
Non-Hot-Pluggable Device
If the device is non-hot-pluggable, the server must be powered down. Non-hot-pluggable
devices in the server include the processor, all boards, memory modules, fans, PCI option
cards, and drive cages.
Powering Down the Server
The server does not completely power down when the front panel power button is pressed.
The button toggles between On and Standby. The standby position removes power from most
electronics and the drives, but some internal circuitry remains active. To completely remove
all power from the system, disconnect all power cords from the server.
WARNING: To reduce the risk of injury from electric shock, disconnect all power cords
to completely remove power from the system.
WARNING: To reduce the risk of personal injury from hot surfaces, allow the internal
system components to cool before touching them.
CAUTION: Protect the server from power fluctuations and temporary interruptions with a
regulating uninterruptible power supply (UPS). This device protects the hardware from
damage caused by power surges and voltage spikes, and keeps the system in operation
during a power failure.
CAUTION: The server must always be operated with system unit covers on. Proper cooling is
not achieved when the system unit covers are removed.