Computer Hardware & GSM Repair lesson notes for JSS1–JSS3 & SS1–SS3

What students learn

By the end of SS3, a student who has worked through these notes should be able to:

• Classify computer hardware and describe peripheral devices and internal components
• Apply workshop safety rules and choose the right tools for computer and GSM repairs
• Assemble a computer and carry out preventive maintenance on computer hardware
• Disassemble and reassemble a GSM phone and identify common GSM faults
• Trace GSM circuits and read a schematic diagram to locate faults in the power, audio, display and network sections
• Perform software flashing, data recovery and basic micro soldering
• Set up a simple network and protect a computer from viruses and internet security threats
• Plan, carry out and report on a repair project, including the basics of running a small ICT business

What each class covers

Every topic is a separate lesson note, listed here in teaching order. Open any topic, or the term, to read it.

JSS2 Computer Hardware & GSM Repair 23 notes

First Term 7 notes

• Computer Hardware (Advanced)
• GSM Circuit Boards
• Computer Bios and Booting Process
• Introduction to Operating System
• Practical: Formatting and OS Installation
• GSM Accessories
• Disassembling a Computer

Second Term 8 notes

• Computer Memory
• GSM Signal
• Common Software Problems
• Practical: Virus Removal
• GSM Faults and Causes
• Practical: Changing Phone Screen
• Introduction to Networking
• Connecting Computer in LAN

Third Term 8 notes

• Data Backup and Recovery
• GSM Software
• Introduction to GSM Operating System
• Practical: Phone Software Upgrade
• Power Management in Devices
• Troubleshooting Motherboard
• Replacing RAM/Hard Disk
• Preventive Maintenance II

SS1 Computer Hardware & GSM Repair 24 notes

First Term 8 notes

• Introduction to Computer Hardware and GSM Repairs
• Classification of Computer Hardware
• Peripheral Devices
• Internal Components of a Computer
• Safety Rules and Workshop Practices
• Tools for Computer and GSM Repairs
• Computer Assembly I
• Computer Assembly II

Second Term 8 notes

• Introduction to GSM Technology
• GSM Hardware Components
• GSM Software Components
• GSM Repair Tools
• Disassembly and Reassembly of GSM Phones
• Common GSM Faults II
• Common GSM Faults I
• GSM Software Issue

Third Term 8 notes

• Maintenance of Computer Hardware
• Power Supply System
• Introduction to Networking Hardware
• GSM Communication Principles
• GSM Connectivity Issues
• Computer and GSM Accessories
• Preventive Maintenance Practices
• Entrepreneurship in ICT

SS2 Computer Hardware & GSM Repair 23 notes

First Term 7 notes

• Computer Storage Device
• Advanced Computer Components
• Computer Troubleshooting I
• Computer Troubleshooting II
• Maintenance of GSM Tools
• GSM Circuit Boards
• GSM Circuit Tracing

Second Term 8 notes

• Review of GSM Hardware
• GSM Power Section
• GSM Audio Section
• GSM Display Section
• GSM Network Section
• Software Flashing
• Unlocking GSM Devices
• Data Recovery Techniques

Third Term 8 notes

• Advanced Computer Repair I
• Advanced Computer Repair II
• Computer Viruses and Security
• Networking Setup
• GSM Software Optimization
• Troubleshooting GSM Software Issue
• Internet Security Issue
• Small Scale ICT Business

SS3 Computer Hardware & GSM Repair 23 notes

First Term 7 notes

• Advanced Diagnostic Tools
• GSM Schematic Diagram
• Micro Soldering Techniques
• Advanced Computer Networking
• Repair Case Study
• Professional Ethics in ICT Repair
• ICT Career Opportunities

Second Term 8 notes

• GSM Advanced Repairs
• Smartphone Technology
• Advanced Computer Maintenance
• Entrepreneurship in ICT
• E-Waste Management
• ICT Business Marketing
• Financial Management
• Project Planning

Third Term 8 notes

• Final Year Project Supervision
• Project Execution
• Project Execution II
• Project Report Writing
• Presentation Skills
• Mock Exams
• Revision of Practical Work
• WAEC/NECO Preparatory Classes

How we prepare our lesson notes

Each note covers one topic for one class and one term, and the notes follow teaching order. Every note has behavioural objectives, the lesson content in short sections, evaluation questions and an assignment drawn from the same note.

Notes are edited for accuracy, plain language and the right level for the class before they are published.

Every note is free to read online. A PDF or Word copy of one subject costs ₦1,000 for one term, or ₦2,000 for all three terms. If you find a mistake, tell us and we will correct it.

Recommended Computer Hardware & GSM Repair textbooks

Books are grouped by class. The line under each title shows which list recommends it.

JSS1 Computer Hardware & GSM Repair textbooks 1 book

Name	Author	Publisher
Computer Hardware and GSM Repairs for Junior Senior Secondary SchoolsFG NERDC approved list, 2026 to 2028Edition: First Published 2026	Dr. Olanrewaju O. Ayannuga	Tanus Books Limited

SS1 Computer Hardware & GSM Repair textbooks 1 book

Name	Author	Publisher
Computer Hardware GSM Repairs for Senior Secondary Schools 1FG NERDC approved list, 2026 to 2028Edition: 2026	Dr. Olanrewaju O. Anyannuga	Tanus Books Limited

Based on the 2026/27 recommended lists. Editions change, so confirm the current edition with your school or bookseller.