220-1101 Hardware and Network Troubleshooting Practice Question
A technician is troubleshooting a projector that displays a 'No Signal' message even though a laptop is connected via HDMI and the laptop's display is working. The technician confirms the HDMI cable is securely connected to both the laptop and projector. Which of the following should the technician check NEXT?
⚠ Common exam trap
The trap here is assuming a hardware failure like a bad cable or lamp before checking the projector's input selection.
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
✓
Press the appropriate input/source button on the projector.
The 'No Signal' message indicates the projector is not receiving a signal from the selected input. Since the cable is connected, the most likely cause is that the projector is set to a different input source. Checking and selecting the correct input on the projector is the next logical step.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Replace the projector's lamp.
Why it's wrong here
A failed lamp would cause no image or a very dim image, but the projector is displaying a 'No Signal' message, which means the lamp is working. Replacing the lamp would not address the lack of signal. The issue is with the input source or cable, not the projection light source.
- ✗
Replace the HDMI cable with a VGA cable.
Why it's wrong here
Switching cable types is premature before verifying the projector's input selection. The HDMI cable could be faulty, but the first step is to ensure the projector is set to the correct input. If that fails, then trying a different cable is reasonable. However, replacing with VGA is not a direct solution and may not be necessary.
- ✗
Adjust the laptop's screen resolution to match the projector's native resolution.
Why it's wrong here
An incompatible resolution might cause an 'Out of Range' or distorted image, but it would not typically result in a 'No Signal' message. The projector would still detect a signal and attempt to display it. The lack of any signal suggests the input is not selected or the cable is faulty.
- ✓
Press the appropriate input/source button on the projector.
Why this is correct
The projector may be set to a different input source than the one the laptop is connected to. Pressing the input/source button cycles through available inputs (HDMI, VGA, etc.). This is a quick and common fix for 'No Signal' errors when the cable is connected but the projector is not looking at the right port.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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.