I'm a newbie, the manual looked scary and confusing so I hid it back in its box for now. Took ure advise and double checked battery compartment and then removed the rear cover. Definitely something loose but can't pinpoint exactly where, so its back to the shop for the guru's to sort out. Oops! I'd already turned it on before I noticed the noise and it didn't go bang so thats a bonus!!!!! [>:]