Laptop to Amp interference

[anonymous-user]

I have just purchased an old amp to run a pair of speakers my dad gave me, its a Trio KA-1500.
I brought a connector off ebay so I can plug my mp3 into it, running my ipod with the new amp produces fantastic sound quality.

The problem is, as soon as I plug the connector into the headphone jack on my computer I get masses of interferance.

Would any one be able to advise me on what might be causing this and how I can stop it?

[anonymous-user]

I've tried that, but even when the sound is muted the interferance remains.

Some websites suggest a ground look isolator may get rid of this problem, possibly correct?

[anonymous-user]

I'm using the same 3.5 jack cable for the mp3 and laptop

TonyRPH said:

I suggest unplugging the laptop charger, and see if the noise goes away?

Yup, when I unplug my laptop charger it plays perfectly clear.