I have this QSC USA-850 poweramp that I blew by bridging without the bridge switch on. There was heavy clipping on both channels, and the sound was a low volumed distortion. Next time I turned it on, nothing worked. Now when I turn it on, I hear a bzz that lasts a second, after the amps been on for a few seconds, then nothing. Both channels, or bridged. I wouldn't be surprised if it costs more to service it than to get a new one. I'm gonna do it myself and save a few hundred dollars! I have schematics off the QSC webpage. Is it just two blown transformers that need replacing? Do rubber gloves seem like a good idea? (there's alotta voltage in there) Am I doing something stoopid? Thanks!