Hi guys. My laptop is making a strange noise that sounds like static. I doubt it is coming from the fans, as I cleaned them out thoroughly. Also, the sound only occurs when my laptop is plugged in, and turned on. If the laptop is plugged in, but is turned off, the sound isn't there. Also, the sound is not there when laptop is just running off the battery. What do you guys think is going on here? Thoughts and help greatly appreciated 
