I was at a gig on Monday night and set up my gear as usual and we did a soundcheck and everything was fine. When I came back to do the gig later on my RH450 wouldn't power up, and hasn't powered up since. Has anybody experienced anything like this? I haven't had any problems with it before this and it showed no signs of any faults leading up to this! I thought it might just be a blown fuse but there's no accessible fuses to check and the units seem pretty well sealed! Does anybody have any ideas what the problem might be? Thanks.