Well, this may be my breaking point with Klipsch. I still have a dead nearly new boxed Promedia 5.1, a dead Synergy 10 amp ( originally from the current sub and I purchased a pull online) and now the replacement pull amp died as well. I've read as many threads as I could find but can't find what mine is doing (or not doing). It's not blowing fuses. The power light isn't doing anything. No pops, sputters or any sign of life. There are no hot spots or blown components that I can see anywhere. The boards are definitely getting power from probing. I've read to replace the MOSFETs. However, don't they blow fuses when they're bad? Any tips would be greatly appreciated.