We’ll surely try and assist you with your concern. Please let us know if you hear the sound when the AC adaptor is connected to the system or when not connected. If you hear the sound when the AC adaptor is connected, please try charging the system using a good known adaptor and check if the sound exists. Please share the results.
Also, provide us the following information via private message. To send a private message, click on my name and select ‘Send private message’
1. Service tag 2. Email address and 3. The name under which the system is registered
Click here to find the video with instructions to locate the service tag.