If you suddenly find your laptop soundless upon booting up, try these 7 simple fixes.
Just a few steps can help you resolve sound problems on Windows laptops.
Firstly, restart your laptop. This is crucial as Windows, being an OS with numerous background applications, can easily clash and result in sound loss. This issue is common across various models like Lenovo IdeaPad 100S to HP Envy 13 d020TU, so there's no need to panic.

Step 1: Check the connection with speakers or headphones. The 3.5mm jack may be damaged, preventing the output device from receiving signals from the laptop. In such cases, adjust, reconnect the jack, or replace the cable if it's damaged.

Step 2: Check the speakers. In some cases, you might have forgotten to turn on the speaker switch. The obvious solution is to simply turn the speaker switch on.

Step 3: Check the volume on the speakers/headphones. Twist the volume knob on the speakers and phone to see if you accidentally turned off the speakers or phone!

Step 4: Check the overall volume.

On Windows, there's a centralized audio management system that includes both the operating system and application audio. If you accidentally mute the system sound, your laptop will be as silent as a mute person. Fixing this issue: You need to access the system-wide audio settings by clicking on the speaker icon usually located in the bottom right corner of the laptop to adjust the volume.
Step 5: Check individual volume.

Individual volume refers to the volume level within each program you have open, such as VLC media player, Media player, etc., which helps in playing music or videos. If you mute them, you won't be able to listen to music or watch movies. The solution is to increase the volume above 0.
Step 6: Missing audio device drivers.

If the above methods fail, it's highly likely that your laptop is missing the driver for the speakers/headphones. Drivers play a crucial role in connecting software (on the computer) with hardware devices (speakers/headphones).
Step 7: After updating the driver, if your laptop still doesn't produce any sound, there are two possibilities. One, either the speakers or headphones are damaged, visit the nearest Mytour store to choose a suitable product. Two, the sound card is faulty, in which case, visit the authorized service center for diagnosis.