IT Troubleshooting Methodology Explained (CompTIA 6-Step)

Troubleshooting Methodology

1 min readPublished 22 Jul 2026

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Great technicians don't guess — they follow a repeatable troubleshooting method that solves any problem calmly and consistently.

Interactive explainer

The CompTIA Troubleshooting Methodology

The six-step method every A+ technician is expected to know by heart.

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1. Identify the problem

Gather the facts.

Question the user, back up data before making changes, identify what changed recently, and reproduce the issue if you can. Never skip the backup step.

Check your understanding

1. What must you always do before making changes when identifying a problem?

2. What is the final step of the methodology?

Keep learning

Hardware Troubleshooting Software Troubleshooting CompTIA A+

Practise this in AI Interview™

The CompTIA 6-step process

Identify the problem — gather information, ask the user, reproduce it.
Establish a theory of probable cause (question the obvious first).
Test the theory — confirm or move to the next.
Plan and implement the fix.
Verify full functionality and prevent recurrence.
Document findings, actions and outcomes (see documentation).

This structured approach works for hardware, software and networks alike, and pairs with root cause analysis for recurring issues. It's tested directly in the A+ exam and every support interview.

Interview Intelligence

How this topic actually shows up in interviews — and how to demonstrate you understand it.

Why employers ask about this

A structured troubleshooting method is the single most tested skill in support interviews.

Technical questions

Walk me through your troubleshooting process.+

Identify, theorise, test, plan/implement, verify, document — a calm, repeatable method for any issue.

Behavioural questions

Tell me about solving a difficult technical problem.+

Show a structured approach and how you verified and documented the fix.

Real-world scenarios

“A user says 'the internet is down' but others are fine.”+

Expected answer: Follow the method: gather info, reproduce, form a theory (their device/config), test, fix, verify and document.

Practise in AI Interview™Rehearse these questions, scored.Plan with Career Coach™A personalised path to your goal.Evidence it in Career Passport™Prove this skill to employers.

Employability Intelligence

Where this knowledge takes you — the jobs, skills and certifications it feeds into.

Relevant roles

IT Support TechnicianHelp Desk EngineerDesktop Support Engineer

Skills you're proving

TroubleshootingProblem solvingMethod

Recommended certifications

CompTIA A+ITIL 4 Foundation

Career progression

IT Career Skills → support/engineering roles.

What employers expect

That you can work professionally: communicate clearly, follow process, document, and put the user first.

Frequently asked questions

What is the first step in troubleshooting?

Identify the problem — gather information from the user and reproduce the issue before theorising causes.

Why document after fixing an issue?

So the resolution is reusable, patterns are visible, and recurring problems can be addressed at the root.

Why 'question the obvious first'?

Many issues have simple causes (a cable, a setting); checking these first saves time.

Practise what you've learned

Turn this guide into real, evidenced progress

Missiora helps you measure, improve and evidence the capabilities employers actually value — start with the tools best suited to this topic.

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Missiora is an AI Employability Intelligence platform. Our resources are researched and reviewed by the Missiora team to help you measure, improve and prove your career readiness.