So, was at practice yesterday with my band, and whaddya know, the MG cuts out. Its a marshall mg100dfx, and just wont produce any sound. Has anyone got an idea on how to fix it? I took out the chassis, had a look around, nothing seems to be wrong. Had a look at the speaker, nothin wrong there. Of course, i could have missed something.....im not a genious at electronics. Perhaps something happend the transformer? As it was in a cold room for quite a while?

The amp turns on, ie, the lights come on, the fan whirrs.....blah blah, just no sound comes out. Ocassionaly, i get a click or a buzz as i plug in a cable, but just for a split-second as its plugged in. Any ideas?

So, i wanna build a 100watt amp. Its just a simple affair, im ripping the guts out of my 10watter, putting in new electronics, and putting in new electronics. I plan to put a ~70watt speaker into it, and then using the enclosure of another 10 watt amp for a makeshift "cab" to put a 50watt speaker into it. I plan to put in celestions, or peavy speakers. But, i have no idea of what schematic to use. Hopefully one of you can give me a link to a schem, with a parts list, and also where i can buy a ready-etched PCB for it. Im looking for a simple schem, not too hard to build, this is just going to be a learning experience.



^^thats the amplifier im gutting.