[PROBLEM] CEC with Optoma beamer and Denon AVR 1910

[rikardo1979]

just checked the the details of your Optoma projector and it does support CEC so I presume it should work even with remote from it.
Try that steps I mentioned and please post back

Optoma details

Quote:Optoma HD20 Projector: Pros

Good out of the Box picture quality (though greens are a touch weak)
Very good color accuracy post calibration in best mode
Well balanced, good overall picture quality, pretty natural skin tones
A very bright entry-level projector in its "best" mode, just above average brightness in its brightest mode
Two HDMI 1.3 inputs, full support for 24 fps, Deep Color, CEC etc.
Good, well structured menu system
Longer than average lamp life for lower cost of operation
No filters to change, minimizing maintenance
Small size makes it portable - a good choice for those backyard movie nights

BTW your Denon has CEC support too

Quote:Connectivity & Future-ready Expandability

Supports HDMI with 3D, Audio Return Channel, Deep Color, “x.v.Color”, Auto Lipsync and HDMI CEC control function
Direct play for iPod and iPhone via USB
7.2ch pre-out for maximum system expandability
11 speaker terminals for height/wide/B speakers
Multizone management (3 zones)