I plugged my wired headphones into the device, but the sound isn't coming through them. What should I do?

Hi @thùy anh

At the taskbar, click on the speaker icon, then click on the speaker name, there should be a list of speakers to select, select the one you desire.

Or go to Settings > System > Sound, Under "Choose your output device", there is a box that you can change your output device, or if it doesn't work, try running the troubleshooter in the same settings menu.

Hope this helps!

Best regards,

Nanta