Computers aren’t silent, but a new noise is worth paying attention to. Some sounds are harmless. Others are an early warning that something is about to fail. Here’s how to tell them apart.
Clicking or grinding from inside: act now
What it sounds like: rhythmic clicking, ticking, scraping or grinding, often when opening files or starting up.
What it means: this is the classic sound of a failing hard drive (the older, spinning kind). The parts that read your data are struggling.
What to do: 1. Back up your important files immediately, starting with the ones you can’t replace. 2. Avoid restarting or running big tasks until the backup is done. 3. Plan to replace the drive, ideally with an SSD, which has no moving parts.
If the drive has already stopped working, stop using it and see our guide to recovering files. Professional recovery may still be possible.
Not sure if you have a hard drive? Solid-state drives (SSDs) are completely silent. Clicking can only come from a hard drive, a fan or a DVD drive.
Loud whirring or roaring: the fans
What it means: fans speed up when the computer gets hot. Constant loud fans usually mean dust buildup, blocked vents or a program working the processor hard.
What to do: – Check Task Manager (Ctrl + Shift + Esc) or Activity Monitor for an app using lots of CPU. – Clean the vents with compressed air. – Use laptops on a hard, flat surface.
See our overheating guide for the full walkthrough.
Rattling, buzzing or grinding fan
What it means: a fan with a worn bearing, or something touching the blades, such as a loose cable or a clump of dust.
What to do: turn off the computer and check for anything obstructing the fan (desktops are easy to open; laptops less so). A fan that grinds or rattles after cleaning needs replacing. They’re usually inexpensive, and a failed fan leads to overheating.
Beeps when you turn it on
What it means: a pattern of beeps at startup, with nothing on screen, is your computer’s way of reporting a hardware problem, often with memory (RAM) or the graphics card.
What to do: count the beeps (long and short) and look up the pattern on your PC or motherboard maker’s support site. On a desktop, reseating the memory sticks often fixes it.
High-pitched whine or squeal
What it means: this is usually coil whine: electrical parts vibrating at a high pitch, often under heavy load such as gaming. It’s annoying but generally harmless.
If the whine comes from a charger or power supply and is new or getting louder, replace that part to be safe.
Buzzing or crackling from the speakers
What it means: electrical interference, a loose cable or a driver problem.
What to do: check the audio cable connections, move phones away from the speakers, try a different USB port for USB speakers, and update your audio drivers. See our audio guide.
Popping, sizzling or a burning smell: stop
Unplug the computer immediately and don’t turn it back on. These are signs of an electrical fault. Have it checked by a professional.
The bottom line
- Clicking or grinding drive: back up right now.
- Loud fans: clean out the dust and check for busy apps.
- Rattling fan: replace it before it fails.
- Startup beeps: look up the code.
- Pops or burning: unplug it and get help.
A new noise is your computer asking for attention. The sooner you act, the cheaper the fix.
