Quick Answer
Most Acer Chromebooks with no sound are stuck on the wrong audio output, muted at the system level, or affected by a stuck audio process. Check the volume and output device first — that resolves the majority of cases without touching any settings deeper than the status area.
Causes
- Wrong output device selected — if a Bluetooth speaker or HDMI display was ever connected, ChromeOS may still be routing audio there.
- System muted or volume at zero — easy to trigger accidentally with the volume keys or a stray keypress.
- Stuck audio process — a hung Chrome tab or app can occasionally lock the audio pipeline for the whole system.
- App-level mute — some apps and sites have independent mute controls separate from the system volume.
- Speaker hardware fault — less common, usually confirmed only once every software cause is ruled out.
How to Fix It
1. Check the system volume and mute state
Click the status area in the bottom-right corner and confirm the volume slider isn’t at zero or muted. Also press the dedicated volume-up key a few times to rule out a stuck mute toggle.
2. Confirm the correct output device
In the same status area menu, check which audio output is selected. If a Bluetooth speaker or an HDMI/USB-C display is listed instead of “Speakers,” switch it back manually.
3. Test with headphones
Plug in wired headphones. If sound works through headphones but not the built-in speakers, the issue is isolated to the speaker hardware or its driver — see our speaker issues guide for further diagnosis.
4. Restart the Chromebook
This clears a stuck audio process, which is a common cause of sound cutting out with no obvious trigger, especially after heavy multitasking or a crashed tab.
5. Check the site or app’s own volume control
Many streaming sites and apps have an independent volume slider separate from the system volume. Confirm it isn’t muted at the source before assuming a system-wide problem.
6. Update ChromeOS
Go to Settings > About ChromeOS > Check for updates. Acer occasionally ships audio driver fixes through regular ChromeOS updates.
7. Powerwash as a last resort
⚠ This erases local data (files not backed up to Google Drive). A Powerwash resets the entire audio configuration and clears persistent software-level sound issues.
Still Not Fixed?
If headphones also produce no sound after all the steps above, or if you hear crackling and distortion instead of silence, this points to a hardware fault rather than a settings issue. That typically means a failed speaker or a loose internal connection — a repair technician can confirm with a quick diagnostic.
FAQ
Why does sound work in headphones but not the speakers?
That isolates the problem to the built-in speaker hardware or its driver, not the general audio system — software fixes like a Powerwash are unlikely to help at that point.
Could a ChromeOS update have caused this?
Occasionally, yes. If sound stopped working right after an update, check for a follow-up update within a few days — audio regressions are usually patched quickly.
Does a Powerwash fix a broken speaker?
No. Powerwash only resets software and settings. If headphones work but the speakers don’t after every other step, the speaker itself needs repair, not a reset.
