Solved Static noise from home theater system

[nishaddesilva]

I have an Akira 5-speaker home theater system which I connected to my old Fujitsu laptop's line out. I bought an Inspiron 3521 recently and when I connect its line out to the speaker system there's a static noise coming from it. When I disconnect the laptop's power cable the static noise gets lower. Can anybody who have a good knowledge on electronics help me out? Thanks in advance.