Removal And Replacement Procedures - Microtower (Mt) Chassis; Preparation For Disassembly - HP Compaq dx2250 Service & Reference Manual

7 Removal and Replacement Procedures
— Microtower (MT) Chassis
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:

Preparation for Disassembly

1. Close any open software applications.
2. Exit the operating system.
3. Remove any diskette or compact disc from the computer.
4. Turn off the computer and any peripheral devices that are connected to it.
CAUTION:
CAUTION:
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.
5. Disconnect the power cord from the electrical outlet and then from the computer.
6. Disconnect all peripheral device cables from the computer.
NOTE:
routing. Keep all screws with the units removed.
CAUTION:
using the wrong screw in an application may damage the unit.
ENWW
Not all features listed in this guide are available on all computers.
Turn off the computer before disconnecting any cables.
Regardless of the power-on state, voltage is always present on the system
During disassembly, label each cable as you remove it, noting its position and
The screws used in the computer are of different thread sizes and lengths;
Preparation for Disassembly 59