I bought an HP Pavilion dv8315 nr laptop on July 8th last year. Recently, I am hearing a low vibration noise at the fan region. The noise doesn't always accompany the fan however, and it varies in volume and pitch. I have tried to include a sound file...it isn't a good recording, but if you listen to the background you can hear the buzzing noise. reminds me of a toothbrush that's on low battery.
In fact, as I post this, the fan is running but the noise isn't as unnatural. What do I do?