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It sounds like coil whine. If the system is still under warranty call Dell tech support for your region and they can help.
https://www.notebookcheck.net/FAQ-Coil-Whine.225152.0.html
It sounds like coil whine. If the system is still under warranty call Dell tech support for your region and they can help.
https://www.notebookcheck.net/FAQ-Coil-Whine.225152.0.html