Changing the fuse will do nothing, its a protection thing if the amp turns on the fuse is fine, and if it blows it means somthing else is wrong and it blew protecting itself. If it is only a 15W amp its prob small and cheaper. Your prob better off just replacing it for 30 or 50 bux at a used music store. If you dont have a store near check www.musicgoround.com for cheap Guitars amps drums and pa stuff and band stuff.
but your best chance is to take it to a music store. They can help.
Scot Standard, October 2006