HP Z4 Maintenance and Service Guide - Page 21

Cleaning the monitor, Service considerations, Tools and software requirements, Screws

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● Visible debris underneath or between the keys may be removed by vacuuming or shaking. ● Canned, pressurized air may be used to clean debris from under the keys. Caution should be used as too much air pressure can dislodge lubricants applied under the wide keys. ● If you want to remove a key, use a specially designed key puller to prevent damage to the keys. This tool is available through many electronics supply outlets. CAUTION: Never remove a wide, level 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 then 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 towelette designed for cleaning monitors or with a clean cloth moistened with water. 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 computer case on page 12. Service considerations Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer. Tools and software requirements To service the computer, you need the following: ● Diagnostics software ● Flat-bladed screwdriver (may sometimes be used in place of a Torx screwdriver) ● Phillips #2 screwdriver ● Torx30 screwdriver ● Torx15 screwdriver 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 strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations. CAUTION: As each subassembly is removed from the computer, it should be placed away from the work area to prevent damage. Service considerations 13

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●
Visible debris underneath or between the keys may be removed by vacuuming or shaking.
●
Canned, pressurized air may be used to clean debris from under the keys. Caution should be used as too
much air pressure can dislodge lubricants applied under the wide keys.
●
If you want to remove a key, use a specially designed key puller to prevent damage to the keys. This tool
is available through many electronics supply outlets.
CAUTION:
Never remove a wide, level 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 then 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 towelette designed for cleaning monitors or with a clean cloth
moistened with water. 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 computer case
on page
12
.
Service considerations
Listed below are some of the considerations that you should keep in mind during the disassembly and
assembly of the computer.
Tools and software requirements
To service the computer, you need the following:
●
Diagnostics software
●
Flat-bladed screwdriver (may sometimes be used in place of a Torx screwdriver)
●
Phillips #2 screwdriver
●
Torx30 screwdriver
●
Torx15 screwdriver
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
strongly recommends that all screws removed during disassembly be kept with the part that was removed,
then returned to their proper locations.
CAUTION:
As each subassembly is removed from the computer, it should be placed away from the work area
to prevent damage.
Service considerations
13