I. Introduction

• Importance of maintenance in prolonging computer and network life

• Preventive vs. corrective maintenance

• Customer service orientation
  
  

II. Learning Outcomes

At the end of this module, learners should be able to:

1. Perform preventive maintenance on computer systems and networks.

2. Diagnose and troubleshoot system and network faults.

3. Repair and replace faulty components.

4. Apply safety and ESD precautions during repair.

5. Document maintenance and repair activities.
   
   

III. Learning Content

1. Maintenance Fundamentals

• Preventive vs. corrective maintenance

• Tools for maintenance (hardware tools, software tools)

• OHS and ESD practices
  
  

2. Preventive Maintenance Procedures

• Cleaning and checking system units

• Updating OS, drivers, and antivirus

• Checking network cables, switches, routers
  
  

3. Troubleshooting Computer Systems

• Common hardware issues (no boot, overheating, RAM, PSU faults)

• Common software issues (slow performance, OS corruption, viruses)

• Troubleshooting techniques (isolation, swapping, diagnostics tools)
  
  

4. Troubleshooting Networks

• Connectivity problems (IP conflicts, cable faults, router misconfig)

• Tools: ping, tracert, ipconfig, netstat

• Wireless troubleshooting (signal, interference, encryption)
  
  

5. Repair and Replacement

• Replacing defective parts (HDD, RAM, PSU, cables)

• Reinstalling OS and software

• Reconfiguring devices after repair
  
  

6. Documentation and Reporting

• Maintenance checklist

• Service report preparation

• Client/user feedback and acceptance
  
  

IV. Learning Activities

• Hands-on preventive maintenance on desktops and laptops

• Network troubleshooting lab exercises

• Repairing/replacing defective parts

• Simulation: service call and client interaction
  
  

V. Assessment Methods

• Written exam (maintenance concepts, troubleshooting procedures)

• Practical demonstration (actual repair and troubleshooting)

• Oral questioning (diagnosis explanations)

• Portfolio submission (maintenance checklist, service report)
  
  

VI. Resources

• TESDA Training Regulations for CSS NC II

• Computer units and spare parts

• Networking devices and cables

• Diagnostic software and tools (multimeter, cable tester, etc.)