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[JimH]

I've been gradually trying to reduce my power consumption at home.  I made a discovery yesterday that I didn't expect.  I have mostly Sony equipment, partly because I try to stay with a single manufacturer to minimize problems.

I found that my receiver (around 2 years old) has a setting for "Power Save".  I set it to "On" and hoped for the best.

It turned itself off after an hour or so of no playback.

I have a newer Sony TV in another room that does this, and when it does, it takes the receiver down.  HDMI can do this if you tell it to.

[newsposter]

yup, the HDMI power feature controls are a stealth way into setting your connected devices into a reduced power state.  I think you need HDMI 1.2 (components and cables, there is an extra pin that early build and/or cheap cables might not implement) but maybe not.

I've seen HDMI switches that could be configured to set unused and idle ports into the standby state.