my reciever is acting very strange these days.when i power up the unit and change inputs ie dvd, sat which are digital connections as well as cd input which is analog .the unit has no sound . if i change to another input still no sound . so i cut it off come back and by some miracle i here audio. also i tried to go back to system setup but the remote will not scroll down to the options. when i push the enter button nothing happens. is the unit fried or what? it works for a couple of days then it starts again. i am assuming it is a recevier problem. oh by the way it is a vsx-26tx elite about 3.5 years old. time for a denon 3803?