The correct first step is to verify the CPU is on the motherboard’s supported CPU list and update the BIOS if needed. This is because a new CPU may require a specific BIOS revision to function, even if it physically fits the socket; the fan spinning only confirms power to the motherboard, not that the CPU is recognized or initialized. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of the POST process and the critical role of BIOS compatibility—a common trap is assuming a physical fit guarantees operation, or immediately reseating the CPU. Remember the memory tip: “Spin doesn’t mean sync”—a spinning fan indicates power, but a blank screen points to a CPU that isn’t communicating, so always check the motherboard’s CPU support list and BIOS version first.
220-1101 CPU Practice Question
This 220-1201 practice question tests your understanding of cpu. 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.
During a motherboard replacement, a technician installs a new CPU but the system fails to POST. The CPU fan spins, but the screen remains blank. Which of the following should the technician check 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.
Why wrong: The CPU fan spinning indicates power is reaching the board, but the CPU may still lack power; however, this is less likely than a compatibility issue.
B
Reseat the RAM modules
Why wrong: RAM issues can cause no POST, but since the CPU was just replaced, CPU-related problems are more probable.
C
Verify the CPU is on the motherboard's supported CPU list and update BIOS if needed
Many motherboards require a BIOS update to support newer CPUs; checking compatibility is the first logical step.
D
Replace the CMOS battery
Why wrong: A dead CMOS battery can cause time/date resets but rarely prevents POST entirely with a new CPU.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Verify the CPU is on the motherboard's supported CPU list and update BIOS if needed
When a system fails to POST with a new CPU, the most common issue is compatibility or improper installation. The technician should verify the CPU is supported by the motherboard's BIOS version.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Check if the CPU power connector is plugged in
Why it's wrong here
The CPU fan spinning indicates power is reaching the board, but the CPU may still lack power; however, this is less likely than a compatibility issue.
✗
Reseat the RAM modules
Why it's wrong here
RAM issues can cause no POST, but since the CPU was just replaced, CPU-related problems are more probable.
✓
Verify the CPU is on the motherboard's supported CPU list and update BIOS if needed
Why this is correct
Many motherboards require a BIOS update to support newer CPUs; checking compatibility is the first logical step.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Replace the CMOS battery
Why it's wrong here
A dead CMOS battery can cause time/date resets but rarely prevents POST entirely with a new CPU.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1201 NAT questions on configuration and troubleshooting.
CPU — This question tests CPU — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Verify the CPU is on the motherboard's supported CPU list and update BIOS if needed — When a system fails to POST with a new CPU, the most common issue is compatibility or improper installation. The technician should verify the CPU is supported by the motherboard's BIOS version.
What should I do if I get this 220-1201 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1201 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This 220-1201 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 220-1201 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.