hissing in earphones when laptop plugged in

[SuperNoob]

Hello, I'm relatively new to electronics, so please excuse me if this is in the wrong chat.

When my laptop is plugged in, I can hear hissing, beeping and static and such when I wear earphones even if the volume is on mute, though that does quiet it down. Mute will quiet it a little but turning the volume all the way up or all the way down doesn't affect it. All of the noise disappears completely when I unplug the laptop and use the battery. Is there any way I can fix this on my own, cheaply, without voiding my laptop warranty?

 

[shrtrnd]

If it's under warranty, contact the mfgr with the problem. If phones work ok on battery, but are noisy when computer plugged-in to the wall, you're picking-up noise from the power line, or power supply. You try to 'fix' it yourself, you WILL void warranty.