HP 285 G3 User Manual

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.
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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 bers
or dirt in conned areas. Allow the parts to air dry before reassembly.
Cleaning the monitor
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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
ammable liquids on the monitor.
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To clean the monitor body follow the procedures in Cleaning the Computer Case on page 10.
Cleaning the mouse
Before cleaning the mouse, ensure that the power to the computer is turned o.
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Clean the mouse ball by rst 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.
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To clean the mouse body, follow the procedures in Cleaning the Computer Case on page 10.
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: The cooling fan is always on when the computer is in the “On” mode. The cooling fan is o when the
computer is in “Standby,” “Suspend,” or “O” 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:
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Torx T-15 screwdriver
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Torx T-15 screwdriver with small diameter shank (for certain front bezel removal)
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Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)
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Phillips #2 screwdriver
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Diagnostics software
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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 dierent lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP
Service considerations 11

HP 285 G3 Specifications

General

Brand	HP
Model	285 G3
Category	Desktop
Language	English