Preventive Maintenance

Rectify/Correct Defects in Computer System and

Networks

Preventive maintenance can be described as maintenance of

equipment or systems before fault occurs. It can be divided into two
subgroups: Planned Maintenance and Conditioned-Based
Maintenance.

Planned Maintenance (PM) is any variety of scheduled maintenance

to an object or item of equipment. Specifically, PM is a scheduled
service visit carried out by a competent and suitable agent, to ensure
that an item of equipment is operating correctly to avoid any
unscheduled breakdown and downtime of an equipment.
Rectify/Correct Defects in Computer System and
Networks

Condition Based Maintenance (CBM) is a maintenance strategy that

uses the actual condition of the asset to decide what maintenance
needs to be done. CBM dictates that maintenance should only be
performed when certain indicators show decreasing performance or
upcoming failure. Checking a machine for these indicators may
include non-invasive measurements, visual inspection, performance
data and scheduled tests. Condition data can be gathered at certain
intervals, or continuously.
Rectify/Correct Defects in Computer System and
Networks

The purpose of systematic inspection, detection and correction of

existing / future problems is very important to maintain equipment /
facilities in satisfactory condition before it may cause major problem.
Maintenance, including tests, measurements, adjustments, and parts
replacement, performed specifically to prevent faults from occurring.

Maintenance is divided into two (2) general type. Preventive

maintenance is given for maintaining equipment and facilities in
satisfactory operating condition to extend the life of the equipment.
Corrective maintenance is task performed to identify, isolate, and
rectify a fault so that the failed equipment or system can be restored
to an operational condition within the tolerances or limits.
Maintenance Procedures

In preparing maintenance procedure, you also must consider

designing a systematic plan for both for hardware and software. This
saves time, money and frustration and ensures safe conditions to
prevent injury to people and damage to computer equipment.

Planning Maintenance Procedures for Computer System and

Networking:
A. Design a systematic maintenance plan for hardware.
1. Design a monitoring, evaluating, and updating plan.
2. Place your computer in a well-ventilated area.
3. Schedule the use of computer for its longer life.
4. Move the computer only when it is turned off and unplugged.
5. Treat your computer properly.
Maintenance Procedures

B. Design a systematic maintenance plan for your software.

1. Backup your files.
2. Install or secure passwords.
3. Delete temporary files.
4. Update anti-virus and spyware.

Design a systematic monitoring, evaluating, and updating plan for hardware.

Computers have significantly changed the working environment, simplifying, and
speeding up many tasks across many work areas. However, with these advances
are some potential problems and maintenance issues. These guidelines describe
how computer technicians, students and computer users can work together to
achieve a productive workplace environment. The guidelines reflect current
knowledge and best practice for the use of computers so you can achieve
maximum efficiency and safety in your workplace.
Maintenance Procedures

Place your computer in a well-ventilated area.

❖ This will allow proper circulation of air inside the computer unit.

Schedule the use of computer for its longer life.

❖ This will help lessen the attacks of viruses and increases the life span of
your computer.

Move the computer only when it is turned off and unplugged.

❖ To avoid damage to the computer unit always turn off and unplug it when
transferring the computer to another location.
Maintenance Procedures

Treat your computer properly.

❖ This means taking care of your computer. PCs and laptops should be
properly turned off.

Do systematic maintenance plan for your computer software.

Back-up your files
❖ Protecting your files means creating backups, storing your file backups
on your hard drive or any removable storage device regularly.

Install or secure passwords.

❖ Installing passwords makes your files more secure.
Maintenance Procedures

Delete temporary files.

❖ Deleting the temporary files on your computer will enhance its speed and
will create more disk space for your files.

Update anti-virus and spy ware.

❖ Regularly update your anti-virus for your computer protection against
viruses.
Preventing Computer System Failure

Computers, in general, are stable, and you can usually rely on them to not fail you.
However. If you develop some basic habits, you can postpone serious computer
problems, if not avoiding them entirely. 6

1. Computer issues. Know that your computer is going to fail. You need to treat
your computer as if it were a doomed failure. Always assume that failure is
imminent.
A fatal error results in data loss, damage to your computer and/or its ability to
function, hardware failure, or other serious issues.
2. Dust issues. Preventing failure means making sure your computer is physically
clean in its operations. Make sure that there is not too much dust inside, especially
on the fans. Dust can reduce performance and cause overheating.
3. RAM issues. Know your computer's specifications and its limits. RAM runs even
the PC is running idly. It consumes RAM storages capacity making you difficult to
open a program if RAM storage had been consumed.
Preventing Computer System Failure

4. Malware issues. Make sure that your anti-virus software is updated to be

able to scan unnecessary files that enter your PC. Do not install programs
that you’re not familiar with or if do not fully trust.

5. Hardware issues. When something is not working properly, either

diagnose the problem yourself and fix it, to prevent further damage or
contact a professional and have them look at it for you. Take advantage of
warranties on parts if they fail.

6. Warning issues. If the same error message shows up every time you log
in, be sure to investigate it. Although unlikely, these errors could be
important.
Preventing Computer System Failure

7. Usage issues. Give your computer a break. Believe it or not, your

computer likes rest, too. Leaving it on all the time wears out hardware and
puts unnecessary wear and tear on the hardware. Giving your computer a
break also saves you money (electrical bills).
8. Warranty issues. Always take advantage of warranties. Get a warranty
to protect your hardware, so it can be replaced in case of failure.
9. Backup issues. Back-up everything. Run regular backup of your
important files to other disks, computers, or an online backup service.
10. Error message issues. If your PC fails to function, diagnose the
problem. Write down the necessary info such as error messages or things
don’t work properly. If you know how to fix it, do it, to avoid further
damage but if not then seek for professional help.
Preventing Computer System Failure

In recent years, software defects have become the dominant cause of

customer outage, and improvements in software reliability and quality
have not kept pace with those of hardware. Yet, software defects are not
well enough understood to provide a clear methodology for avoiding or
recovering from them.
Debugging is the group of activities that software developers perform to
fix a bug, so being a good debugger is a very important part of being a
good developer.
Three reasons to consider debugging one of your main skills:
• We spend a lot of time debugging.
• There are always errors in your code
• Debugging is sometimes the only way to check that some code is
working fine.
Preventing Computer System Failure

There are thousands of problems that your PC could have, from an endless
list of possible error messages to various hardware failures. Most of those
problems might have several possible causes as well. Most of these
potential issues are rare. The problems most computer users see are
common errors and failures seen by many, many others.

There are some of the most common PC problems:

• Computer will not turn on
• Blue screen of death (BSOD)
• “404” / “page not found” error
• “Hal.dll is missing” error
Preventing Computer System Failure

Computers and computer components can fail at any time and for any
reason. If the defect can ultimately be traced back to the design,
programming, or manufacturing process, you might be entitled to recover
compensation through a class-action lawsuit. Many people think that
hardware and software are one in the same. In fact, hardware and
software are very different. Hardware refers to the physical components of
the computing unit — tower, monitor, printer, keyboard, mouse, and the
physical pieces of equipment that comprise these components —while
software refers to the coding or built-in instructions that allow the
hardware to run properly.
Individual

Directions: Answer the following questions. Use 1 whole sheet of

paper.

1. In your own understanding explain the ff:

- Planned Maintenance
- Preventive Maintenance
- Condition Based Maintenance
2. Enumerate some of the planning maintenance procedures for hardware
and software?
Group Activity (Brainstorming)

Directions: Utilize your previous groupings. Use the manila paper provided
to share your experiences

Let the students share their experiences on how they maintain their
computer both in hardware and software components and the different
issues they’ve encountered when using computer.
The leader will consolidate their experiences and one of the group
member will present their output.
Individual

Directions: Read and analyse the following scenarios and answer the
questions provided. Use 1 whole sheet of paper.

Scenario 1:
Anna notices her computer frequently shuts down after 20 minutes of use.
She checks the system and finds the CPU temperature is very high.

Questions:
1. What do you think is the issue for this scenario?
2. What could be the possible reasons for Anna’s computer overheating?
3. What steps should she take to ensure the issue is resolved effectively
and prevent it from occurring again?
Individual

Directions: Read and analyse the following scenarios and answer the
questions provided. Use 1 whole sheet of paper.
Scenario 2:
Maria’s computer takes several minutes to boot up and frequently freezes
during operation. She has 8GB of RAM and a 500GB hard drive with 80%
storage used.
Questions:
1. What do you think is the issue of this scenario?
2. What factors might be contributing to Maria’s computer’s slow
performance?
3. What action should Maria take to improve her computer’s
performance?
4. How could this issue be resolved? Provide some recommendations to
optimize its operation.