- A
The phone won't power on.
Why wrong: The power button uses a separate flex cable; dislodging volume flex does not affect power.
- B
The touchscreen becomes unresponsive.
Why wrong: Touchscreen uses a different flex cable connected to the display assembly.
- C
The volume buttons become unresponsive.
The dislodged flex cable directly controls volume; without connection, buttons don't work.
- D
The speaker stops producing sound.
Why wrong: Speaker uses its own flex cable or soldered connections, not the volume button flex.
Question 280 of 1,020
Volume Button Flex Cable Dislodged: Symptoms and Fix
This 220-1201 practice question tests your understanding of mobile device hardware servicing. 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 repair, you accidentally dislodged a small ribbon cable connecting the volume button flex to the mainboard of a smartphone. Now the volume buttons don't work. What is the most likely result of this mistake?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Quick Answer
The correct answer is that the volume buttons become unresponsive. This happens because the volume button flex cable is a dedicated ribbon cable that carries electrical signals from the physical buttons to the mainboard through a ZIF or latch connector; when dislodged, the circuit is broken, and the buttons lose all electrical connection while the rest of the phone functions normally. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of modular smartphone components and the consequences of disrupting a flex cable during a repair—a common trap is assuming the entire phone might fail, but only the connected feature stops working. To remember this, think of a lamp: if you unplug its cord, the bulb goes dark, but the room’s other lights stay on.
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
✓
The volume buttons become unresponsive.
The volume button flex cable directly connects the physical volume buttons to the mainboard. Dislodging this cable interrupts the electrical circuit that carries the button press signal, so the buttons become unresponsive. This is a direct physical disconnection, not a software or power issue.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The phone won't power on.
Why it's wrong here
The power button uses a separate flex cable; dislodging volume flex does not affect power.
- ✗
The touchscreen becomes unresponsive.
Why it's wrong here
Touchscreen uses a different flex cable connected to the display assembly.
- ✓
The volume buttons become unresponsive.
Why this is correct
The dislodged flex cable directly controls volume; without connection, buttons don't work.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The speaker stops producing sound.
Why it's wrong here
Speaker uses its own flex cable or soldered connections, not the volume button flex.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The 220-1201 exam often tests the misconception that a single ribbon cable controls multiple unrelated functions, leading candidates to incorrectly assume a dislodged volume button cable would affect the speaker or power-on sequence.
Detailed technical explanation
How to think about this question
In modern smartphones, the volume button flex cable is a thin FPC (Flexible Printed Circuit) that uses a ZIF (Zero Insertion Force) connector on the mainboard. The cable contains two separate traces for volume up and volume down, each with a dedicated GPIO (General-Purpose Input/Output) pin on the SoC. When the button is pressed, it shorts the trace to ground, and the SoC detects the voltage drop. Dislodging the cable leaves the GPIO pins floating, so no voltage change is detected.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1201 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Mobile Device Hardware Servicing — study guide chapter
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Mobile Device Hardware Servicing — This question tests Mobile Device Hardware Servicing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The volume buttons become unresponsive. — The volume button flex cable directly connects the physical volume buttons to the mainboard. Dislodging this cable interrupts the electrical circuit that carries the button press signal, so the buttons become unresponsive. This is a direct physical disconnection, not a software or power issue.
What should I do if I get this 220-1201 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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 →
Same concept, more angles
2 more ways this is tested on 220-1201
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. During a laptop keyboard replacement, a technician accidentally dislodges a small ribbon cable from the touchpad connector. The touchpad is now unresponsive. The technician has never worked on this model before. What is the best course of action to resolve the issue?
medium- A.Use tweezers to gently push the ribbon cable into any nearby empty connector.
- B.Reboot the laptop to see if the touchpad driver reloads.
- ✓ C.Consult the service manual to identify the correct connector and reseat the cable.
- D.Replace the entire keyboard assembly since the touchpad cable is likely broken.
Why C: Option C is correct because the most logical and safe first step when dealing with an unfamiliar laptop model is to consult the service manual. This ensures the technician identifies the exact connector for the touchpad ribbon cable, preventing damage from forcing the cable into the wrong port. Reseating the cable correctly is the standard fix for a dislodged connection.
Variation 2. A customer reports that their laptop's touchpad is unresponsive after they spilled a small amount of liquid on the keyboard. The laptop still powers on and the keyboard works. What is the most likely issue?
easy- A.The touchpad driver is corrupted.
- ✓ B.The touchpad ribbon cable is damaged or disconnected.
- C.The battery is swollen and pressing on the touchpad.
- D.The touchpad is disabled in the BIOS.
Why B: The most likely issue is that the liquid spill has physically damaged or disconnected the touchpad's ribbon cable, which connects the touchpad to the motherboard. Since the keyboard still works, the spill likely affected only the touchpad's dedicated connection path, not the main keyboard controller or system board. A damaged ribbon cable is a common consequence of liquid ingress, even if the laptop powers on normally.
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Last reviewed: Jul 4, 2026
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