Quick Answer
The answer is the power outlet and the power supply, as these are the two hardware components that should be checked first when a computer won’t start. This is because the power outlet is the most fundamental link in the power delivery chain—if it is dead, switched off, or faulty, no electricity reaches the system at all, making startup impossible. The power supply is the next logical check, as it converts incoming AC power to the DC voltages the motherboard and components require; a failed power supply will prevent any power-on activity, even if the outlet is live. On the CompTIA ITF+ FC0-U61 exam, this question tests your understanding of basic troubleshooting methodology, specifically the “start with the simplest and most obvious” principle—a common trap is diving into complex internal diagnostics before verifying the wall outlet. A helpful memory tip is “Plug before PSU”: always confirm the outlet with a lamp or known working device before inspecting the power supply unit.
This FC0-U61 practice question tests your understanding of infrastructure. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A user reports that their computer is not turning on. Which TWO hardware components should be checked first?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
CPU
Why wrong: CPU failure is less common and should be checked after power issues.
Power outlet
A dead power outlet is a simple cause that should be verified first.
RAM
Why wrong: RAM issues usually cause beeps or boot loops, not complete power failure.
Power supply
A faulty power supply can prevent the computer from turning on.
Hard drive
Why wrong: Hard drive failure does not prevent the computer from powering on.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Power outlet
The power outlet is the first component to check because it is the most basic point of failure in the power delivery chain. If the outlet is dead or switched off, no power reaches the system, making it impossible for the computer to turn on. Verifying the outlet with a known working device (e.g., a lamp) quickly isolates this common issue before inspecting internal hardware.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
CPU
Why it's wrong here
CPU failure is less common and should be checked after power issues.
Power outlet
Why this is correct
A dead power outlet is a simple cause that should be verified first.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
RAM
Why it's wrong here
RAM issues usually cause beeps or boot loops, not complete power failure.
Power supply
Why this is correct
A faulty power supply can prevent the computer from turning on.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Hard drive
Why it's wrong here
Hard drive failure does not prevent the computer from powering on.
Common exam traps
The trap here is that candidates often jump to internal components like the power supply or CPU first, forgetting the simplest external cause—a dead or switched-off power outlet—which is the most logical and quickest check in the troubleshooting process.
Detailed technical explanation
The power supply unit (PSU) converts AC mains power to regulated DC voltages (+3.3V, +5V, +12V) required by components. A dead outlet means zero AC input, so the PSU cannot perform this conversion. Even if the PSU is functional, a tripped circuit breaker or a switched-off outlet (e.g., on a power strip) will prevent any power from reaching the system. Always test the outlet with a multimeter or a known working device before suspecting internal hardware.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the FC0-U61 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Infrastructure — This question tests Infrastructure — Read the scenario before looking for a memorised answer..
The correct answer is: Power outlet — The power outlet is the first component to check because it is the most basic point of failure in the power delivery chain. If the outlet is dead or switched off, no power reaches the system, making it impossible for the computer to turn on. Verifying the outlet with a known working device (e.g., a lamp) quickly isolates this common issue before inspecting internal hardware.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This FC0-U61 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U61 exam.
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