There is a constant static/hiss from my Insprion that is present only when my power cord is plugged in. when I remove it the static vanishes. Has nothing to do with any use of the speakers. Static occurs regardless of something on the speakers (i.e. still present in the background if I play music). I ran the audio diagnostic and it just tests the speakers. But this is something else. Suggestions? Do I need a new machine? If this isn't fixable I need to know ASAP.
Thanks.