I even have an Onkyo receiver from the 80's. I was surprised at how the SR606 was constructed to fail. They added an HDMI daughter board right over the sizzling hot component video section of the main board. People noticed that it took a few minutes for convection currents to build for it to start cooling and the amount of heat it produced was more like a tube amplifier! Clearly they had not done any proper testing. I never thought a major manufacturer would make a series of mistakes like this.
To Onyko's major credit, they fixed all of units for free after they failed. SR606's are continuing to fail years after the warranty has expired and Onkyo is still fixing them for free, no questions asked. I hope the cost of these repairs has taught them a lesson about designing products that will obviously fail.