Hello, and sorry you're having problems. We are now connected on this website- which saves you money over having a Tech come to your home, and in many cases we can fix the problem you're having. In other cases, these things do require additional parts to fix- so there's not always a pushbutton reset for this problem.
The only thing that can cause this, is either a faulty processor within the receiver (which requires service as it's failing due to heat/age), or to unplug the receiver from power for 60 minutes or more to drain residual current from the receiver in the hopes that it resets.
With the unit unplugged, remove all connections (speaker wires, RCA cables, etc.) and inspect for signs of kinked/frayed cables ends. In the case of the speaker wires, make sure no bare strands of wire are touching adjacent wires or the back of the receiver. Reconnect the wiring once inspected and make sure it is secure.
If the issue goes beyond this, this does point to a hardware failure requiring service. When these units get on in age (10-15 years +) it's not uncommon for parts to begin to fail and can cause the symptoms your having.
In this case, you're unfortunately looking at around $250 parts and labor for repair- which is on the cusp of the cost of a replacement unit, so not sure I would recommend putting that kind of money into a receiver of this age
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