A couple of weeks ago we had a big wind storm. Our power was knocked out for a couple of hours and when it was restored, my H/K receiver wouldn't run in DD or DTS modes. I tried to reboot it a couple of time, but no luck. Took it to a repair shop and they were able to get it going. The service slip listed the problem as a "confused processor". Luckily this only cost one hour of labor, but if the processor had been fried, it would have been $250! I had been using a cheapo surge protector. So I shopped around and found a very good protector at Radio Shack for $39.98. Much more for the money that I found anywhere else. Just thought that I would share this possibly sad experience.