Okay, so last night I was on my iBook when I smelt burning plastic. I looked at the mains lead and the bit right at the end had burnt through the insulator cable (it was right at the top of the wire, right under the "head" of the charger). I could see sparks coming out of the wires inside. So clearly I need a new mains charger. I'm just wondering if anyone has ever had similar problems with old chargers (I've had this iBook G4 for about four years. Recently the charger has been a bit temperamental, I've had to fiddle with it for a bit to get it light up and start charging the computer). Apart from low battery life, the computer is in pretty good shape. Is buying a new charger likely to sort this out, or could it be an internal problem with the laptop? My friend said it was probably a loose wire in the cable. I'm also wondering where people tend to buy replacement chargers? eBay is cheapest but there seem to be a lot of fakes on there, so I'm considering buying directly from the Apple website or the Apple store in town. Thanks in advance for any advice you can give!