This is a very common search. Many users expect their AV receiver or source device to power on the Sony projector automatically through HDMI-CEC. In practice, the issue usually does not come from a simple setup mistake. It mostly comes from the fact that Sony projectors do not implement that feature the way some televisions do.
HDMI-CEC allows some HDMI devices to send each other simple commands such as power on or power off. It can work between a source, an AV receiver, and a television.
But on a Sony projector, that behavior is generally not available. So you can have a setup that looks correctly wired and configured while the projector still never powers on automatically.
Because the user is trying to solve a concrete symptom: the receiver starts, the source wakes up, but the Sony projector stays off. They then search for phrases like Sony projector CEC, Sony projector HDMI-CEC, or cannot turn on Sony projector with CEC.
When HDMI-CEC is not implemented on the target device, there is no combination of menu settings that can suddenly add full automatic projector startup. You may improve overall HDMI behavior, but you cannot turn a Sony projector into a CEC-compatible power target if it simply does not support that function.
In other words, if your goal is to automate Sony projector startup, the right move is to change the control method rather than keep trying random settings.
Another frequent query is Sony projector trigger or turn on Sony projector with 12V trigger. Here again, the blocker is structural: most Sony projectors do not include Trigger IN.
The AV receiver may provide a 12V trigger output, but that alone cannot directly power on the projector if the matching input does not exist on the projector side.
A universal remote can send a startup sequence, but it does not necessarily know whether the projector actually responded or whether it is already warming up, cooling down, or unavailable.
In a real home theater setup, that missing state awareness is exactly what leads to inconsistent behavior over time.
The robust method is to detect a useful signal in the installation, typically the AV receiver trigger, and then control the Sony projector over the network. That way the system can account for the real projector state and apply the correct startup or shutdown sequence.
That is exactly the CineBridge approach: turn a simple installation event into reliable automation instead of relying on missing HDMI-CEC support or a projector input that does not exist.