220-1101 Hardware Practice Question
A technician is installing a new CPU on a motherboard. The CPU is properly oriented and seated, but the retention arm will not close. What is the MOST likely issue?
⚠ Common exam trap
Candidates often assume the issue is a misaligned CPU (Option C) because they think the key notch is the only alignment factor, but the question explicitly states the CPU is properly oriented and seated, making bent pins the more likely mechanical obstruction.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Bent pins on the motherboard
If the CPU is properly oriented and seated but the retention arm will not close, the most likely cause is bent pins on the motherboard (LGA socket) or on the CPU (PGA socket). Bent pins prevent the CPU from sitting flush, creating mechanical interference that stops the arm from latching. This is a common issue when handling the CPU or socket carelessly.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Wrong CPU socket type
Why it's wrong here
A mismatched CPU socket type means the CPU's substrate dimensions, pin count, or keying layout are incompatible with the physical socket. The CPU would not even begin to enter the socket, let alone be 'properly oriented,' and applying force to seat it would risk catastrophic damage to both components. In practice, the retention arm never gets involved because the CPU cannot make initial contact, so this does not match the reported symptom.
When this WOULD be correct
When a technician attempts to install a CPU that is physically incompatible with the motherboard socket (e.g., LGA1151 CPU into an LGA1200 socket), the CPU will not fit or align correctly, and the retention arm cannot close.
- ✗
Too much thermal paste
Why it's wrong here
Thermal paste is applied to the top surface of the CPU's integrated heat spreader (IHS) after the CPU is already locked into the socket, and it has no influence on the retention mechanism. The paste's purpose is to fill microscopic air gaps between the CPU and the cooler base to improve heat transfer. Even a thick layer would only affect thermals or potentially squeeze out at the edges during cooler mounting; it cannot create resistance when closing the retention arm.
When this WOULD be correct
A technician installs a CPU and the system overheats or fails to boot; the question asks for the most likely cause of poor thermal transfer. In that scenario, excessive thermal paste could act as an insulator.
- ✗
CPU not aligned with the socket key
Why it's wrong here
Socket keys or alignment notches are designed so that the CPU can only be inserted in one orientation; if the CPU is not aligned, it will not drop into the socket and any effort to push it down would bend pins or damage the socket. The question explicitly states the CPU is properly oriented, so this cause is ruled out. Additionally, if misalignment were the issue, the CPU would visibly sit at an angle or refuse to sink into the socket, not cause the arm to resist closure after being fully seated.
When this WOULD be correct
A technician installs a CPU and notices it does not fit into the socket despite correct orientation. The retention arm will not close because the CPU is not aligned with the socket key (e.g., missing the triangle or notch).
- ✓
Bent pins on the motherboard
Why this is correct
In LGA sockets, the pins reside on the motherboard, and any bent pin will physically obstruct the CPU's underside pads from making full contact. This obstruction prevents the CPU from sitting flat, so the integrated loading mechanism (ILM) retention arm will encounter resistance and fail to close without excessive pressure. Since the CPU is correctly oriented, the only remaining mechanical interference that would block latch closure is socket pin damage.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 220-1101 exam frequently reuses these exact scenarios with slightly different constraints.
✓Bent pins on the motherboardCorrect answer▾
Why this is correct
In LGA sockets, the pins reside on the motherboard, and any bent pin will physically obstruct the CPU's underside pads from making full contact. This obstruction prevents the CPU from sitting flat, so the integrated loading mechanism (ILM) retention arm will encounter resistance and fail to close without excessive pressure. Since the CPU is correctly oriented, the only remaining mechanical interference that would block latch closure is socket pin damage.
✗Wrong CPU socket typeWrong answer — click to see why▾
Why this is wrong here
The CPU is properly oriented and seated, so the socket type is correct. A wrong socket type would prevent the CPU from fitting or seating properly, not just cause the retention arm to fail to close.
★ When this WOULD be the correct answer
When a technician attempts to install a CPU that is physically incompatible with the motherboard socket (e.g., LGA1151 CPU into an LGA1200 socket), the CPU will not fit or align correctly, and the retention arm cannot close.
Why candidates choose this
Candidates may confuse a socket type mismatch with other installation issues, assuming that any retention arm problem indicates an incompatible CPU, even when the CPU is already seated.
✗Too much thermal pasteWrong answer — click to see why▾
Why this is wrong here
Too much thermal paste would not prevent the retention arm from closing; it might cause a mess or thermal issues, but the arm's mechanical operation is independent of paste quantity.
★ When this WOULD be the correct answer
A technician installs a CPU and the system overheats or fails to boot; the question asks for the most likely cause of poor thermal transfer. In that scenario, excessive thermal paste could act as an insulator.
Why candidates choose this
Candidates may overestimate the impact of thermal paste on physical installation, confusing a performance issue with a mechanical one.
✗CPU not aligned with the socket keyWrong answer — click to see why▾
Why this is wrong here
The question states the CPU is properly oriented and seated, meaning it is aligned with the socket key. Therefore, misalignment is not the issue.
★ When this WOULD be the correct answer
A technician installs a CPU and notices it does not fit into the socket despite correct orientation. The retention arm will not close because the CPU is not aligned with the socket key (e.g., missing the triangle or notch).
Why candidates choose this
Candidates often confuse alignment issues with other problems, and 'CPU not aligned' is a common cause for retention arm problems, but the question explicitly says it is properly oriented.
Analysis generated from the official 220-1101blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1101 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 220-1101 exam.