- 4.0 Overview of Preventive Maintenance
- 4.1 Preventive Maintenance
- 4.1.1 PC Preventive Maintenance Overview
- 4.2 Troubleshooting Process
- 4.2.1 Troubleshooting Process Steps
- 4.2.2 Common Problems and Solutions for PCs
- 4.3 Overview of Preventive Maintenance and Troubleshooting