Cleaning The Monitor; Cleaning The Mouse; Service Considerations; Power Supply Fan - HP 280 G4 MT Maintenance And Service Manual

CAUTION:
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.

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

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

Service considerations

Listed below are some of the considerations that you should keep in mind during the disassembly and assembly
of the computer.

Power supply fan

The power supply fan is a variable-speed fan based on the temperature in the power supply.
CAUTION:
computer is in "Standby," "Suspend," or "Off" modes.
You must disconnect the power cord from the power source before opening the computer to prevent system
board or component damage.

Tools and software Requirements

To service the computer, you need the following:
● Torx T-15 screwdriver
● Torx T-15 screwdriver with small diameter shank (for certain front bezel removal)
● Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)
Phillips #2 screwdriver
●
● Diagnostics software
● Tamper-resistant T-15 wrench

Screws

The screws used in the computer are not interchangeable. They may have standard or metric threads and may
be of different lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP
12 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are
The cooling fan is always on when the computer is in the "On" mode. The cooling fan is off when the
Cleaning the Computer Case on page
Cleaning the Computer Case on page
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