I have a Yamaha RXV 2095 receiver about 15yrs old, hooked up to a new Samsung 4k tv. My problem is shorly after startup, the digital light on receiver goes off then I lose sound for 3-4 secs, when the light comes back on I have sound. This happens as long as its on. I have checked all connections and replaced the optical cable from rec to tv. I know my receiver is old, but its always worked great. If I need to replace any ideas for $5-600? Thanks