HP 8000f Maintenance and Service Guide: HP Compaq 8000f Elite Business PC Ultr - Page 40

Removal and Replacement Procedures, Preparation for Disassembly

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6 Removal and Replacement Procedures Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly. NOTE: Not all features listed in this guide are available on all computers. Preparation for Disassembly See Identifying the Chassis, Routine Care, and Disassembly Preparation on page 22 for initial safety procedures. 1. Remove/disengage any security devices that prohibit opening the computer (Security Lock Provisions on page 32). 2. Close any open software applications. 3. Exit the operating system. 4. Remove any compact disc from the computer. 5. Turn off the computer and any peripheral devices that are connected to it. CAUTION: Turn off the computer before disconnecting any cables. Regardless of the power-on state, voltage is always present on the system board as long as the system is plugged into an active AC outlet. In some systems the cooling fan is on even when the computer is in the "Standby," or "Suspend" modes. The power cord should always be disconnected before servicing a unit. 6. Disconnect the power cord from the electrical outlet and then from the computer. 7. Disconnect all peripheral device cables from the computer. NOTE: During disassembly, label each cable as you remove it, noting its position and routing. Keep all screws with the units removed. CAUTION: The screws used in the computer are of different thread sizes and lengths; using the wrong screw in an application may damage the unit. 8. If the PC is mounted in the accessory mounting stand, remove it from the stand. 30 Chapter 6 Removal and Replacement Procedures

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6
Removal and Replacement Procedures
Adherence to the procedures and precautions described in this chapter is essential for proper service.
After completing all necessary removal and replacement procedures, run the Diagnostics utility to
verify that all components operate properly.
NOTE:
Not all features listed in this guide are available on all computers.
Preparation for Disassembly
See
Identifying the Chassis, Routine Care, and Disassembly Preparation
on page
22
for initial safety
procedures.
1.
Remove/disengage any security devices that prohibit opening the computer (
Security Lock
Provisions
on page
32
).
2.
Close any open software applications.
3.
Exit the operating system.
4.
Remove any compact disc from the computer.
5.
Turn off the computer and any peripheral devices that are connected to it.
CAUTION:
Turn off the computer before disconnecting any cables.
Regardless of the power-on state, voltage is always present on the system board as long as the
system is plugged into an active AC outlet. In some systems the cooling fan is on even when the
computer is in the “Standby,” or “Suspend” modes. The power cord should always be
disconnected before servicing a unit.
6.
Disconnect the power cord from the electrical outlet and then from the computer.
7.
Disconnect all peripheral device cables from the computer.
NOTE:
During disassembly, label each cable as you remove it, noting its position and routing.
Keep all screws with the units removed.
CAUTION:
The screws used in the computer are of different thread sizes and lengths; using
the wrong screw in an application may damage the unit.
8.
If the PC is mounted in the accessory mounting stand, remove it from the stand.
30
Chapter 6
Removal and Replacement Procedures