Guys...anyone got send their laptop to HP service center b4 a?my laptop is still under warranty...got problem...so need to send there...when i call the helpline...they said that if its a software problem...i will still be charged even if the laptop is still under warranty...my problem is that..i got this buzzing sound when i switch on or off the laptop...then i contact the tech...they told me to update bios...but after update...my comp cannot boot into windows...