The CompTIA A+ troubleshooting methodology is a systematic 6-step process used to diagnose and resolve IT issues efficiently.
1
Identify the Problem
Gather information from users and system. Ask open-ended questions. Document symptoms.
Determine if changes occurred recently. Use inquiry process: what, when, where, who, how.
Replicate the problem if possible.
2
Establish a Theory of Probable Cause
Question the obvious. Consider multiple approaches. Start with simple solutions first.
Research knowledge bases, vendor documentation, and online resources. Develop hypotheses based on symptoms.
3
Test the Theory to Determine Cause
Test your theory. If confirmed, determine next steps to resolve. If theory is not confirmed,
re-establish new theory or escalate. Use safe mode, diagnostic tools, and isolate variables.
4
Establish a Plan of Action
Create action plan with steps to resolve. Consider corporate policies and impact to users.
Get approval if needed. Backup data before making changes. Have rollback plan ready.
5
Verify Full System Functionality
Test the fix thoroughly. Verify the original problem is resolved and no new issues appeared.
Test related functionality. Have user verify fix if possible. Implement preventive measures.
6
Document Findings, Actions, and Outcomes
Create detailed documentation. Record symptoms, solutions, and lessons learned.
Update knowledge base. Document configuration changes. Include date, time, and technician name.
Interactive Troubleshooting Flowcharts
Select a problem type to begin the interactive troubleshooting flowchart:
Boot Failures
BSOD, boot loops, black screen
Slow Performance
System lag, high resource usage
Application Crashes
Programs freezing or closing
Network Issues
No connectivity, slow internet
Printing Problems
Printer offline, print queue issues
Display Issues
No display, distorted graphics
Audio Problems
No sound, distorted audio
Windows Update Failures
Update errors, rollback issues
Windows Recovery Tools Reference
Comprehensive guide to Windows recovery and diagnostic tools: