Service Reference Guide

7–6 Service Reference Guide

Identifying the Chassis, Routine Care, and Disassembly Preparation

■ If you remove a key, use a specially designed key puller to prevent damage to the keys. This

tool is available through many electronic supply outlets.

CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are

improperly removed or installed, the keyboard may not function properly.

■ Cleaning under a key may be done with a swab moistened with isopropyl alcohol and

squeezed out. Be careful not to wipe away lubricants necessary for proper key functions. Use

tweezers to remove any fibers or dirt in confined areas. Allow the parts to air dry before

reassembly.

7.3.4 Cleaning the Monitor

■ Wipe the monitor screen with a clean cloth moistened with water or with a towelette

designed for cleaning monitors. Do not use sprays or aerosols directly on the screen; the

liquid may seep into the housing and damage a component. Never use solvents or flammable

liquids on the monitor.

■ To clean the monitor body follow the procedures in Section 6.2.2.

7.3.5 Cleaning the Mouse

Before cleaning the mouse, ensure that the power to the computer is turned off.

■ Clean the mouse ball by first removing the retaining plate and the ball from the housing. Pull

out any debris from the ball socket and wipe the ball with a clean, dry cloth before

reassembly.

■ To clean the mouse body, follow the procedures in 6.2.2.

7.4 Service Considerations

Listed below are some of the considerations that you should keep in mind during the disassembly

and assembly of the computer.

7.4.1 Power Supply Fan

The power supply fan is a variable-speed fan based on the temperature in the power supply.

CAUTION: The cooling fan is off only when the computer is turned off or the power cable has been

disconnected.

The cooling fan is always on when the computer is either in the “On,” “Standby,” or “Suspend” modes.

You must disconnect the power cord from the power source before opening the computer to prevent

system board or component damage.