I got a Marantz 7702 processor and started running the setup wizard through my Optoma projector. Plugged in the HDMI cable and no picture. Called Marantz to do trouble shooting and they said it must be the HDMI board and to return the unit. So new unit arrives, hook it up to my Optoma HD 25 projector and same problem. This time I call Optoma support and they tell me some units just have handshake issues. Can anyone give me some advice? Thanks