Re: [LAU] loud noise out of external soundcard in the bandroom when AC-powered

Hallo! Are you sure ? Usually the only device with a ground is the power supply unit of the laptop, this is a common problem with laptops+audio. However, this ground is usually only for the power supply unit and not for the laptop (there are only 2 cables going of it to the laptop DC input). For example I bought a new power supply unit which has no ground at all (they exist and don't come with any warning) and have no more problems ... Before that I always removed the grounds (I put a plastic on them), which could be dangerous of course ... I don't want to suggest removing the grounds, rather I want to know what other people think, if the ground is really necessary for the laptop or if it is just for the power supply unit ? LG Georg