My old tech friends refer to the dead NAD as a boat anchor. We use to play golf with am/fm Delcoes in the late 70's, you will need a good sludge hammer. Very sad to hear of your plight, glad you were home. I always consider NAD as a really good brand-I have no experience with their equipment. My good buddy Chrisopher Coffin, superb audio tech, had this to say about fuses. A 200 picture tube will blow and save the life of a 25 cent fuse(1979). Not quite his original saying, but you get the drift.
Beware of NAD M3 Fire Hazard
My $3k NAD M3 started shooting sparks out the top and burned the shelf that was 8" above. Luckily I was home and not sleeping or the house would have burned down. If anyone has one of these I advise them to unplug it when not in use. I took it to two different repair shops and they said it would be about $800 to just get it running and there may be board issues. They advised not to take the gamble. Anyone have any suggestions on what to do with it?