Been through 3 different brands of receivers with the latest being a Sony DH 540. After watching TV, anywhere from 3 hours to 3-4 days apart, our receiver just suddenly powers down for what seems to be no reason. I've been trouble shooting this for like 3 months now and am ready to pull my hair out! Now that I'm on my 3rd receiver, just had a thought that maybe the power from my house may be the culprit. Put a voltage meter on the outlet I use, and powered up our heat pump that was installed new about 10 months ago, and the voltage dipped from 119.6 volts to 117.3. Super quick. Could this be the issue?? Do receivers need a solid 119-120 volts or can they withstand drops like that? I'm seriously all ears.