sameo

Well a bit of a backstory. Got my new HP Pavillion DV9000 (17', 4gbRAM, 2.1 ghz, vista sp1) and connected it to my old big screen bp TV via s-video cord and the video came up fine other then minor resolution changes (easily fixed) but there were white lines running through the screen and thats where my problem began...

since then I hooked it up to my home stereo via headphone to RCA jacks and began noticing a rather annoying hum coming from my speakers.

I tried all variables I could come up with until I got my result; the lines and hum only occur when the laptop is plugged in and charging. Well I thought "Oh crap the new laptop I just got is defective I suck at life". But after taking it to my buddies house and plugging it in (charging and s-video) with no interference, I deduced the problem must be something in my house.

Now i realize this isn't a home improvement site and I was hoping someone may have a suggestion that doesn't involve removing walls and rewiring (landlords frown upon that) but I am open to anything at this point because this sucks a whole bunch.

Thanks alot
Sameo