Computer Maintenance and Safety - SSS 1

COMPUTER MAINTENANCE & SAFETY

Subject: Digital Technologies
Class: SSS 1
Term: First Term
Week: 9
Topic: Computer Maintenance & Safety
Duration: 80 Minutes (Double Period)

LEARNING OBJECTIVES

By the end of the lesson, students should be able to:

Explain the meaning of computer maintenance.
Differentiate between preventive and corrective maintenance.
Identify common practices used in maintaining computers.
Explain the importance of proper handling of computer equipment.
Identify common causes of computer damage and malfunction.
State health and safety precautions when using computers.
Explain appropriate safety rules for a computer laboratory.
Demonstrate safe practices when handling computer equipment.

1. INTRODUCTION TO COMPUTER MAINTENANCE

Computers and other digital devices are valuable equipment that require proper care to function effectively. Dust, heat, moisture, improper handling, electrical problems, malware and careless use can cause damage or reduce the performance of computer systems.

Definition: Computer maintenance refers to the activities carried out to keep a computer system clean, functional, secure and in good working condition.

Maintenance involves both physical care of computer equipment and software-related activities. Regular maintenance can help reduce faults, improve performance and extend the useful life of computer equipment.

2. TYPES OF COMPUTER MAINTENANCE

2.1 Preventive Maintenance

Preventive maintenance involves taking steps to prevent computer problems before they occur.

Examples include:

Cleaning dust from computer equipment.
Keeping computers in a clean and well-ventilated environment.
Installing security updates.
Using reliable antivirus or security software.
Backing up important files.
Checking cables and connections.
Using a suitable power protection device.
Properly shutting down the computer.

2.2 Corrective Maintenance

Corrective maintenance involves repairing or correcting a problem after a fault has occurred.

Examples include:

Replacing a faulty keyboard.
Repairing or replacing a damaged power supply.
Replacing a failed storage device.
Repairing faulty connections.
Removing malware when a system has become infected.
Reinstalling software when necessary.

Key Difference: Preventive maintenance attempts to reduce the possibility of problems occurring, while corrective maintenance deals with problems after they have occurred.

3. PREVENTIVE CARE OF COMPUTER EQUIPMENT

Good preventive care helps protect both the hardware and software of a computer system.

3.1 Keep the Computer Clean

Dust and dirt can accumulate around computer equipment and may interfere with ventilation and cooling. Screens, keyboards, mice and other equipment should be cleaned using appropriate methods and materials.

Safety Note: Never pour or spray liquid directly onto a computer, monitor or other electronic equipment. Equipment should be powered off when appropriate before cleaning, and cleaning materials should be used according to the manufacturer's guidance.

3.2 Provide Adequate Ventilation

Computers generate heat during operation. Air vents should not be blocked because restricted airflow can cause overheating.

Computers should therefore be placed in locations where air can circulate freely.

3.3 Protect Against Electrical Problems

Electrical fluctuations, surges and power interruptions can damage computer components or cause loss of data.

Appropriate power-protection equipment such as surge protectors or uninterruptible power supplies (UPS), where suitable, can provide additional protection.

3.4 Keep Software Updated

Operating systems and applications should be updated regularly. Updates may provide security improvements, bug fixes, compatibility improvements and other enhancements.

3.5 Use Security Software and Safe Practices

Computers should be protected against malware and other digital threats. Users should avoid opening suspicious attachments, downloading software from untrusted sources or visiting unsafe websites.

3.6 Back Up Important Data

Important files should be backed up regularly. Backups can help recover information if the original files are accidentally deleted, damaged, lost or affected by a hardware or software problem.

4. PROPER HANDLING OF COMPUTER EQUIPMENT

Computer equipment should be handled carefully to prevent physical damage.

Important Handling Practices

Handle computers and peripheral devices gently.
Do not drop or hit computer equipment.
Do not pull cables forcefully.
Hold connectors correctly when connecting or disconnecting cables.
Keep food and drinks away from computers.
Do not place heavy objects on laptops, keyboards or monitors.
Do not block ventilation openings.
Keep computers away from excessive moisture.
Use the correct procedures when switching equipment on and off.
Transport laptops and other portable devices using appropriate protection.

5. COMMON CAUSES OF COMPUTER DAMAGE

Cause	Possible Effect	Preventive Measure
Dust accumulation	Overheating and reduced performance	Regular cleaning and proper ventilation
Liquid spills	Short circuits and hardware damage	Keep liquids away from equipment
Power surges	Damage to electronic components	Use suitable power protection
Excessive heat	Overheating and system instability	Ensure adequate ventilation
Physical impact	Damage to internal or external components	Handle equipment carefully
Malware	Data loss, system problems or security breaches	Use security software and safe computing practices
Improper shutdown	Possible data loss or file/system problems	Use the proper shutdown procedure

6. HEALTH AND SAFETY WHEN USING COMPUTERS

Computer use should not only protect the equipment but also protect the health and safety of the user.

6.1 Proper Sitting Position

Users should sit comfortably with their back supported and their feet appropriately positioned. The computer screen should be placed at a comfortable viewing position.

6.2 Appropriate Viewing Distance

The screen should be positioned at a comfortable distance to reduce unnecessary eye strain. Users should avoid sitting extremely close to the monitor.

6.3 Take Regular Breaks

Long periods of continuous computer use can cause fatigue and discomfort. Users should take appropriate breaks and change position periodically.

6.4 Proper Keyboard and Mouse Use

The keyboard and mouse should be positioned so that the user's hands and wrists can remain in a comfortable position. Excessive force should not be used when typing or clicking.

6.5 Adequate Lighting

The computer area should have suitable lighting. Excessive glare or very poor lighting can contribute to eye discomfort.

6.6 Electrical Safety

Users should not touch exposed electrical wires or damaged electrical equipment. Damaged power cables and plugs should be reported to a responsible person.

Important: Students should not attempt to repair exposed electrical wiring or open electrical equipment unless they are properly trained and authorized to do so.

7. COMPUTER LABORATORY SAFETY

A computer laboratory contains several electrical and electronic devices. Students must follow laboratory rules to protect themselves, other people and the equipment.

Important Computer Laboratory Safety Rules

Follow the teacher's or laboratory supervisor's instructions.
Do not run or engage in horseplay inside the computer laboratory.
Do not eat or drink near computer equipment.
Keep the laboratory clean and orderly.
Keep cables properly arranged to prevent tripping.
Do not touch electrical sockets with wet hands.
Do not use damaged electrical equipment.
Do not connect or disconnect equipment unnecessarily.
Report faults immediately to the teacher or laboratory technician.
Do not open the computer case without permission and appropriate supervision.
Use computers only for authorized activities.
Log out and shut down equipment correctly when instructed.

8. COMPUTER LABORATORY EMERGENCY PRACTICES

Students should know what to do when an emergency occurs.

If there is smoke, a burning smell or unusual electrical activity, stop using the equipment and immediately inform the teacher or responsible person.
If liquid is spilled near electrical equipment, do not touch the equipment or attempt to clean it while it is energized. Report the incident immediately.
In the event of fire or another emergency, follow the school's emergency procedures.
Do not attempt to repair electrical equipment unless properly trained and authorized.

9. IMPORTANCE OF COMPUTER MAINTENANCE AND SAFETY

Proper maintenance and safety practices are important because they:

Extend the useful life of computer equipment.
Reduce the frequency of equipment failure.
Improve computer performance and reliability.
Help protect important data.
Reduce the risk of accidents.
Protect users from electrical and physical hazards.
Reduce unnecessary repair and replacement costs.
Promote a clean and organized computer laboratory.
Support responsible use of digital equipment.

10. MAINTENANCE CHECKLIST

Maintenance Area	Good Practice
Physical cleanliness	Keep equipment and the work area clean and free from excessive dust.
Ventilation	Keep air vents clear and provide adequate airflow.
Power	Use appropriate power protection and report damaged cables.
Software	Keep operating systems and applications appropriately updated.
Security	Use safe computing practices and appropriate security software.
Data	Back up important files regularly.
Handling	Handle equipment carefully and avoid unnecessary force.
User safety	Maintain proper posture, lighting and safe electrical practices.

11. CLASS ACTIVITY

Activity 1: Students inspect the computer laboratory and identify five maintenance or safety practices that are being followed.

Activity 2: Students identify five practices that could damage computer equipment if they were carried out in the laboratory.

Activity 3: In groups, students prepare a short list of computer laboratory safety rules and present them to the class.

Activity 4: Students demonstrate the correct way to sit at a computer workstation and explain why proper posture is important.

12. SUMMARY

Computer maintenance involves activities carried out to keep computer systems clean, functional, secure and reliable. Preventive maintenance helps reduce the possibility of faults, while corrective maintenance deals with problems after they occur.

Proper handling involves keeping equipment clean, avoiding physical damage, protecting devices from excessive heat and moisture, using appropriate power protection and following correct operating procedures.

Computer users should also observe health and safety practices such as maintaining proper posture, taking regular breaks, using appropriate lighting and avoiding contact with damaged electrical equipment.

In a computer laboratory, users must follow safety rules, keep the environment clean, avoid food and liquids near equipment, manage cables properly and report faults or emergencies immediately.

13. EVALUATION

What is computer maintenance?
Differentiate between preventive and corrective maintenance.
State five preventive maintenance practices.
State five ways of handling computer equipment properly.
Identify four common causes of computer damage.
State five health and safety precautions when using computers.
State six safety rules that should be observed in a computer laboratory.
Explain why proper ventilation is important for computers.

14. ASSIGNMENT

Define computer maintenance and explain two types of computer maintenance.
List and explain eight preventive maintenance practices.
State ten computer laboratory safety rules.
Explain five health and safety precautions that computer users should observe.
Prepare a simple maintenance checklist for a school computer laboratory.

Computer Maintenance and Safety - SSS 1 Note