Finally had a chance to have a proper play with my Powermac. I've connected my speakers to it and i'm getting a buzzing sound from them even if the volume is set to 0. Also their is a ticking sound that ticks every second. I've disconnected the speakers for now and I've tried with headhphones and that seems fine. I've tried different cables and thay all have the same effect. I suspect I need a better quality of cable but I don't remember having this ticking noise when I had my Powerbook connected. Thanks for any advice given. I hope their is nothing wrong with it as this will be my second Powermac in 2 weeks. I don't really want all the hassle of sending it back.