|If you are in the USA, to my knowledge, unlike the UK, there is no mains (domestic power supply) plug fuse. However there is likely to be a fuse inside the computer.|
Unusual though for an earpiece to do anything like that, even if it is faulty - these things are usually customer proof. Could just be an evil coincidence and that there was a hardware failure inside the laptop - power supply perhaps.
Always pop back and let us know the outcome - thanks
message edited by Derek