Iphone Accessories and Consumer Electronics

Surround Sound makes buzzing noise out of speakers?

I use my laptop as a DVD player and plug it into the front audio of my reciever. It works fine UNLESS i have the power plugged into my computer. As soon as I plug in the power supply to my laptop a large buzzing sound comes out of the speaker. If I run my laptop on battery the sound comes out fine fromt the entertainment center. Any ideas. Sounds like some sort of grounding problem to me.
proffesor this sounds like a great answer however I’m confused. Could you explain a little simplier

You have a ground loop. Adding grounds like the previous poster suggested can sometimes help, but usually makes it worse. You need a single point of ground, not a whole bunch of grounds. Adding one might help though.

A simpler way to get a ground from your laptop if to look on the back where the serial and parallel ports are. They have screws on the sides to hold the connectors on them If I remember correctly, they are standard machine screw size 2-56. Go to home depot or lowes and get a screw and the needed wire to ground the laptop. I personally do not think this will work.

The only way I have fixed laptop based ground loops is lifting the ground pin on the AC plug using one of those 2 prong to 3 prong adapters, also available from lowes and home depot. This is not a proper fix but it does usually solve the problem.

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