I have an Acer Helios 300 I7, Randomly I hear Loud Pitch Sound from the headphone

Here are some general troubleshooting steps you can try:

Power Drain: Turn off the laptop, disconnect all cables, and hold the power button for 15 seconds. This will perform a software battery reset that may resolve the issue1.

Battery Reset: If your laptop has a pinhole on the bottom (usually indicated by a battery symbol), you can try a battery reset. Insert a pin into the hole and hold it for 30 seconds2.

BIOS Defaults: If the problem persists, you can try resetting the BIOS to its default settings. To do this, turn on the computer and tap F2 to enter the BIOS. Press F9 to load the BIOS defaults, then press F10 to save and exit3.

If these steps don’t resolve the issue, it could be a hardware problem. In that case, you might want to contact Acer’s customer service or a professional technician for further assistance.

Please note that these are general suggestions and might not solve your specific issue. If you’re not comfortable performing these steps, or if the problem persists, I recommend contacting Acer’s customer service or a professional technician for further assistance. Remember to back up all important data regularly, as battery issues can sometimes cause unexpected shutdowns.

You can reach Acer’s technical support in the United States at the following number: (371) 760-1000. They are available to assist with product setup, technical troubleshooting, and general questions you may have about your Acer product.
If you prefer texting, you can text them for support at 1-877-220-2321. This service is available from 5AM to 2AM CST.
Please have your device’s serial number or SNID ready when you contact them, as this information will help them assist you more effectively.