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Question

Difficulty: MediumTroubleshooting Methodology

An IT support technician is tasked with resolving an issue where a interactive digital signage kiosk in a corporate lobby unexpectedly reboots during operation. Place the following technician actions in the correct sequential order according to the CompTIA 6-step troubleshooting methodology, starting with the first action.

  1. 1Interview lobby personnel regarding recent environment changes and review system event logs for thermal fault entries.
  2. 2Develop a hypothesis that excessive dust accumulation on the processor heat sink is causing thermal throttling and unexpected reboots.
  3. 3Boot into hardware diagnostics to monitor real-time CPU temperature levels while running a stress test to confirm thermal overload.
  4. 4Open the kiosk chassis, clean the internal fans and heat sink with compressed air, and reapply thermal compound to the processor.
  5. 5Run the kiosk continuously for one hour while monitoring thermal telemetry, then set up a recurring maintenance task for monthly dust cleaning.

Answer

The correct sequence follows the standard CompTIA troubleshooting framework: 1. Gather information and review logs (Identify the problem), 2. Develop a thermal overheating hypothesis (Establish a theory of probable cause), 3. Monitor CPU temperatures with diagnostic tools (Test the theory), 4. Clean heat sinks and reapply thermal paste (Implement the solution), 5. Run continuous telemetry checks and set up a monthly maintenance schedule (Verify functionality and implement preventive measures).
The standard CompTIA troubleshooting model follows a strict linear sequence: 1. Identify the problem (interviewing staff and checking logs), 2. Establish a theory of probable cause (hypothesizing thermal throttling from dust), 3. Test the theory (monitoring temperatures in diagnostics), 4. Implement the solution (cleaning components and replacing thermal paste), 5. Verify system functionality and implement preventive measures (testing telemetry and scheduling recurring maintenance), and 6. Document findings.

Step-by-Step Solution

1
Identify the problem by gathering details.
Discovered thermal error logs and user reports of sudden reboots.
Troubleshooting must always start by collecting symptoms and identifying what has changed.
2
Establish a theory of probable cause.
Formulated a theory that dust buildup is causing CPU thermal shutdowns.
A technician must consider potential root causes after identifying problem symptoms.
3
Test the theory to confirm the cause.
Diagnostic tools verified CPU temperatures exceeded safe operational thresholds.
Testing the theory confirms whether the hypothesis is correct before implementing changes.
4
Plan and implement the solution.
Cleaned heat sink assembly and refreshed thermal compound.
Once the cause is verified, physical maintenance and repairs are carried out.
5
Verify full functionality and implement preventive measures.
Confirmed stable operating temperatures under load and scheduled monthly maintenance.
Verification ensures the fix resolved the issue without secondary failures, while preventive measures guard against recurrence.

Key Concept

CompTIA 6-Step Troubleshooting Methodology Sequence
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Topics

Troubleshooting Methodology

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