AVS Special Member
Join Date: Jun 2005
Location: Northern, VA - Washington, DC
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Does your TV turn on with your AVR? Would you expect it to?
Most 12v triggers on projectors are outputs which drop a motorized screen. Many projectors do not have a 12v trigger, some do, some don't, but that trigger, is most often for dropping a screen, not controlling the projector.
Now, HDMI contains CEC which may, or may not, properly turn on your projector... or not... maybe. It isn't reliable, and a projector is far to expensive of a device to leave it up to 'maybe' IMO.
Have you considered a good universal remote control which does everything you need it to do? One touch of a button, like 'watch cable' and your projector turns on and the AVR turns on (to the proper input) and your remote runs the cable box?
This is the generally accepted way of running the show reliably, but I'm not sure what some others may have done besides this.
I DO believe the AE8000 from Panasonic can be configured so the 12v connection can act to turn the projector on/off using an external 12v trigger like your A/V receiver. I have not seen that on other models.
AV Integrated - Theater, whole house audio, and technology installation in the Washington DC metro area.