Hi all i have an HP ProBook 4540s, product number is H5H91EA#ACQ.
Ever since I bought it, it has been making a strange buzzing sound, which is not coming out from speakers. It does this about every 5 minutes.
The laptop works fine and I have not experienced any problems. I am currently using Windows 8. I was previously using Windows 7, but it was also making this buzzing sound before. How can I stop this buzzing sound?
Here is the buzzing sound, which I have recorded http://www.mediafire.com/listen/moe37r884d6n16n/HP_ProBook_4540s_buzzing_sound.mp3