PC Beeps Repeatedly No Display: Reseat RAM Modules
A technician is building a new desktop computer. After installing the CPU, heatsink, RAM, and connecting all cables, the system powers on but displays no video. The motherboard has integrated graphics. The technician hears a series of short beeps. What should the technician check first?
⚠ Common exam trap
It's easy for candidates to assume no video means a faulty video cable or GPU, but the beep code and integrated graphics shift the focus to the RAM as the first diagnostic step.
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 RAM
The series of short beeps is a common POST (Power-On Self-Test) code indicating a memory failure. Since the motherboard has integrated graphics and the system powers on, the CPU and power supply are likely functioning. The RAM is the most probable cause because improper seating or faulty modules prevent the system from completing POST and initializing video output.
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 power supply
Why it's wrong here
The power supply is already doing its job: the motherboard is receiving power, the fans spin up, and the BIOS is able to execute POST and emit beep codes. A failing PSU typically produces no activity at all or random reboots, not a repeatable memory-error beep pattern. Beep codes are generated by the motherboard's firmware, so focus on the component the code indicates.
When this WOULD be correct
If the system had no power at all (no fans, no lights, no beeps), the technician should check the power supply first.
- ✗
The CPU
Why it's wrong here
Although a detached or defective processor can produce beep codes, the specific sound of multiple short beeps is a defined memory failure signature in most BIOS implementations. If the CPU were the problem, the system would typically not progress far enough to run the memory test that generates these beeps. POST proceeds through CPU initialization first, so a CPU fault would halt before memory beeps occur.
When this WOULD be correct
If the system powers on but immediately shuts down or fails to POST, and the motherboard has no integrated graphics, the CPU might be improperly seated or damaged. In such a scenario, checking the CPU would be the first step.
- ✓
The RAM
Why this is correct
A series of short beeps during POST is the classic AMI/Award BIOS code for a memory error. Because the system has power and the CPU passed its initial checks, the fault narrows to the RAM modules, their seating, or the slots. Reseating the modules one at a time or replacing them with known-good sticks is the correct diagnostic step.
- ✗
The video cable
Why it's wrong here
A loose or faulty video cable would cause a black screen or no signal indication, but it would not influence the motherboard's POST sequence or its audible error reporting. Beep codes are output through the motherboard speaker relatively early in boot, before the video subsystem is even initialized. Thus, a video cable issue cannot manifest as short beeps, which are tied to memory.
When this WOULD be correct
A technician builds a PC, powers it on, fans spin, no beeps, but no video. The monitor is known working. The technician should check the video cable connection first.
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.
✓The RAMCorrect answer▾
Why this is correct
A series of short beeps during POST is the classic AMI/Award BIOS code for a memory error. Because the system has power and the CPU passed its initial checks, the fault narrows to the RAM modules, their seating, or the slots. Reseating the modules one at a time or replacing them with known-good sticks is the correct diagnostic step.
✗The power supplyWrong answer — click to see why▾
Why this is wrong here
The system powers on and beeps, indicating power is present. A series of short beeps typically signals a memory error, not a power supply issue.
★ When this WOULD be the correct answer
If the system had no power at all (no fans, no lights, no beeps), the technician should check the power supply first.
Why candidates choose this
Candidates may assume any no-video issue is power-related, especially if they've encountered dead systems before, but here the beeps indicate the PSU is working.
✗The CPUWrong answer — click to see why▾
Why this is wrong here
The CPU is already installed and the system powers on, indicating it is receiving power and likely functioning. The series of short beeps typically indicates a memory (RAM) issue, not a CPU problem.
★ When this WOULD be the correct answer
If the system powers on but immediately shuts down or fails to POST, and the motherboard has no integrated graphics, the CPU might be improperly seated or damaged. In such a scenario, checking the CPU would be the first step.
Why candidates choose this
Candidates may assume that no video output is due to a CPU problem because the CPU handles graphics processing, especially when no dedicated GPU is present. They overlook that the beep codes specifically point to RAM.
✗The video cableWrong answer — click to see why▾
Why this is wrong here
The system powers on and beeps, indicating the power supply and CPU are likely functional. No video with integrated graphics and beep codes typically points to RAM issues, not the video cable.
★ When this WOULD be the correct answer
A technician builds a PC, powers it on, fans spin, no beeps, but no video. The monitor is known working. The technician should check the video cable connection first.
Why candidates choose this
Candidates often assume no video is a display connection issue, overlooking that beep codes directly indicate hardware faults like RAM.
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?”
Go deeper
Related to this question
Learn chapter
RAM Types and Memory Slots
Key term
Dual In-line Memory Module
A Dual In-line Memory Module (DIMM) is a small circuit board that holds memory chips and plugs into a computer's motherboard to provide Random Access Memory (RAM).
Key term
RAM
RAM (Random-Access Memory) is volatile computer memory that temporarily stores data for quick access by the CPU.
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JA
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.