PC Components

Why Is My Computer Making a Buzzing Noise?

Cpu Cover And Fan

It is usual for your computer to make some noise while it is running, but when the sound becomes audible enough to disturb or annoy you, that means there is a problem. 

And the problem can be caused by an abnormality in the fan case, screws, cables, DVD/CD-ROM, hard disk, or CPU. Each problem makes its peculiar sound, so you might be able to differentiate and identify which components are causing the sound. Fortunately, this article will help you know why and how you can fix these problems.

5 Reasons Your Computer Is Making a Buzzing Noise and How To Fix Them

These are five components that can cause noise if there is an issue. 

Reason #1: Fan/Fan Case

Many people narrow down noise-related sound to a problem with the fan, but it is not always like that. Your computer’s fan can make noise due to the following issues:

  • Accumulation of dust: Over time, dust accumulates on the cooling fan. And it gets to a point when the dust gets too much and makes it difficult for the fan to spin without so much extra effort. 
  • Obstruction in fan’s pathway: The fan case is close to outer space, so tiny objects can easily enter it and cause obstruction to the fan’s movement.
How to Identify a fan-related problem

If the noise comes from the fan, it will be close to the side where your fan is located, and it will be a loud whirring noise. The fan’s pitch will depend on how big the fan is; small fans tend to make more high-pitched noise than bigger ones.

How To Fix the Fan-Related Problem

Once you have identified the fan as the cause of the noise, you can remove the fan case. Clean the fan and remove any obstruction in the fan case. The sound should no longer be there afterward. 


Do not remove the fan case yourself without prior knowledge so as not to cause harm to other parts of the computer. Also, handle the fan with care; it is made of plastic and easily breaks with force.

Reason #2: DVD/CD-ROM 

When you insert your DVD/CD-ROM, it makes a buzzing sound which continues while in use. But the noise should not be such that it keeps stopping and making loud noises. 

How to identify DVD/CD-ROM related problem

If the noise starts as soon as you insert your DVD/CD-ROM, it is most likely a problem with the disk or case. The noise can sound like crackling or scratching against a board or a particle getting stuck while moving.

How To Fix It

  • Clean the DVD/CD-ROM: the sound might be due to dust accumulation on the DVD/CD-ROM; clean it with a dust blower.
  • Check out the disk: If the issue is with the disk, check for dirt or scratches. If it is due to dirt, clean it and re-insert it. If it is due to scratches, get an alternative.

Reason #3: CPU

If the cause of the noise is the CPU, it is most likely an overload problem. When you are using heavy software or an app infected with a virus, it can cause the CPU to get hot. This will, in turn, cause the fan to work faster than usual, causing louder noise.

How to recognize CPU related problems

If the noise starts whenever you use an app (mostly games and editing apps), the problem is most likely caused by CPU overload. It makes a buzzing noise, and the CPU gets heated. 

How To Fix CPU Related Problems

  1. Go to the “Task Manager” on your computer.
  2. Then, check for your running apps and see if one is pushing the CPU usage.
  3. When you find the app, delete it if it is not needed. If necessary, with no alternative, make sure all other apps are closed when using the app.
  4. If it is a virus-related problem, install an antivirus app

Reason #4: Hard Disk Drive

The hard disk drive is made of so many components, so when it gets worn out, the components can contact each other and make noise. 

How to recognize hard-disk drive related problems

The noise usually sounds like grinding or buzzing or periodic thuds. The sound can come up when you turn on your computer or work on it. And you can experience a slow response when opening your files.

How To Fix Hard Disk Related Problems

If the noise is related to your hard disk, there is hardly any solution except replacement. 


The noise can be a sign to repair the hard disk drive before it finally breaks down. Back up your files so that you do not lose any data.

Reason #5: Loose Screws

This problem usually occurs when you are using a desktop. And it does not happen suddenly; it is generally due to repairs. After the desktop has been repaired and put together, a screw is not well tightened, or a wire is not set in its place, the sound will indicate.

How to recognize screw related problems

You will hear a clicking sound or sound of components hitting each other. This is mostly near the fan because it is the only moving object.

How To Fix Screw Related Problem

If you did not take them apart, you should not put them together. It would be best if you gave it to the professional who repaired it.

But if it is a visibly loose screw, you can get a screwdriver to tighten it. 


The causes of the buzzing noise in your computer are not limited to this. If you cannot identify the cause yourself, give it to an expert. 

Clean the compartments regularly, do not overload your computer with heavy software, do not insert a scratched disk in your DVD/CD-ROM, and install an antivirus. Prevent harm from getting to the computer as much as you can.

Frequently Asked Questions

Why does my computer make a buzzing noise when I’m playing games?

It might mean the game software is overloading the CPU, making the fan overwork to cool down the CPU.

Why is my laptop making sound but not coming on?

If the laptop is not turning on but is giving a sound, the problem is with the mainboard, adaptor, or battery. It would help if you visited a technician.

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