So I finally got round to powering up my original G4, used for music production, in an attempt to connect it to my iMac but like an idiot, I forgot to switch the voltage from 120 to 230 as I’m in UK now...loud pop 
Is there an internal fuse I can switch out or am I looking at a whole new power supply ?
Is there an internal fuse I can switch out or am I looking at a whole new power supply ?