Mike (dmn23)
I'm not sure if its officially documented or not, but when I bought mine from an authorized dealer (which only deal with about 4 or 5 receiver companies), the salesman there told me that there had been some sort of problem with the early generation 5200's, and, if I remember correctly, some issue with the power supply was causing them to die in a small puff of smoke. He assured me mine was a later gen one, and the problem had been addressed. I don't know if he had just seen enough of these to know it was a problem, or if Marantz had officially recogonized a problem. Either way, I'd try going to a dealer and see if they can help you out, or maybe get in touch with Marantz directly.
Sorry, that's probably not a lot of help, but its the best I got.
