I have made a hang on the wall jukebox with a Dell GX270 pc and elo touch screen monitor, everything was great untill I turned on my amp which is built into the cabinet a small 12 volt amp its only used for basic stuff as it has line out to my main amp this is the amphttp://cgi.ebay.co.uk/Car-Motor-bike...1%7C240%3A1318 Its picking fan noise up and if you use the cd drive it picks the motor noise from the drive up ! what can I do and can you buy an audio card with built in amp ?