The NR807 I inherited for my dead 707 stopped producing audio yesterday.I called the shop and they said to bring it in. Took the guy a whole 5 minutes to "re-ball the solder"(???) On the Texas Instruments secondary A/D chip. The chip has the direct correlation to speaker set up.Anybody know a permanent fix?This shop says the current "making do" lasts 6-8 weeks...till it needs reheated(according to them, coincides with our gov requiring leadless solder when these were made).