Rosewill Computer Case 422 Technical Information PDF herunterladen (Seite 50)

Preventive Maintenance

133

Disassembly

and Power

Tech

Tip

Be careful when cleaning LCD monitors and laptop displays

Use one of the following to clean LCD monitors and laptop displays: (1) wipes specifically

designed for LCDs or (2) a soft lint-free cloth dampened with either water or a mixture of

isopropyl alcohol and water. Never put liquid directly on the display and ensure that the

display is dry before closing the laptop.

Denatured alcohol is used on rubber rollers, such as those found inside printers. An anti-

static brush can be used to brush dirt away from hard-to-reach places. Gold contact cleaner is

used to clean adapter contacts as well as contacts on laptop batteries and the contacts where

the battery inserts. A useful CD/DVD/BD cleaning kit can include a lens cleaner that removes

dust and debris from an optical lens; a disk cleaner that removes dust, dirt, fingerprints, and oils

from the disk; and a scratch repair kit used to resurface, clean, and polish CDs, DVDs, and BDs.

Many cleaning solution companies provide MSDS (material safety data sheets) that contain

information about a product, including its toxicity, storage, disposal, and health/safety con-

cerns. Your state may also have specific disposal procedures for chemical solvents. Check with

the company’s safety coordinator for storage and disposal information.

To perform the preventive maintenance, power off

the computer, remove the power cord, and vacuum

the computer with a nonmetallic attachment. Do not

start with compressed air or by blowing dust out of

the computer because the dirt and dust will simply

go into the air and eventually fall back into the com-

puter and surrounding equipment. After vacuuming

as much as possible, use compressed air to blow the

dust out of hard-to-reach places, such as inside the power supply and under the motherboard.

If you are performing maintenance on a notebook computer, remove as many modules as pos-

sible, such as the optical drive, battery, and hard drive, before vacuuming or using compressed

air. Inform people in the immediate area that they might want to leave the area if they have

allergies.

If you remove an adapter from an expansion slot, replace it into the same slot. If the

computer battery is on a riser board, it is best to leave the riser board connected to the moth-

erboard so the system does not lose its configuration information. The same steps covered in

the disassembly section of this chapter hold true when you are performing preventive mainte-

nance.

When you perform preventive maintenance,

take inventory and document what is installed in the

computer, such as the hard drive size, amount of

RAM, available hard drive space, and so on. During

the maintenance procedure, communicate with the

user. Ask if the computer has been giving anyone

trouble lately or if it has been performing adequately.

Computer users like to know that you care about

their computing needs. Also, users frequently ask questions such as whether sunlight or cold

weather harms the computer. Always respond with answers the user can understand. Users

appreciate it when you explain things in terms they comprehend and that make sense.

A preventive maintenance call is the perfect opportunity to check computers for viruses.

Normally, first you clean the computer. Then, while the virus checker is running, you might

clean external peripherals such as printers. Preventive maintenance measures help limit com-

puter problems as well as provide a chance to interact with customers and help with a difficulty

that may seem minuscule but could worsen. A preventive maintenance call is also a good time

to take inventory of all hardware and software installed. In a preventive maintenance call,

entry-level technicians can see the different computer types and begin learning the computer

components.

Know your state aerosol can

disposal laws

Some states have special requirements for disposal

of aerosol cans, especially those that are clogged

and still contain some product.

Tech

Tip

Use a preventive maintenance call as a

time for updates

A preventive maintenance call is a good time to

check for operating system, BIOS, antivirus, and

driver updates.

Tech

Tip

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