I should have sought help here weeks ago, but didn't think about it until now.
I have a 24g HDMI Blue Jeans cable running 40 feet from components to projector. My AVP has two DVI inputs and one out (Outlaw 990). I asked the Outlaw folks if I might have a problem with such a long run, and they said yes, perhaps I should go directly from media player (Oppo 95) to PJ?
The direct connection works fine, but I would like to use the switching in the AVP because I want to use the HDMI-1 input on the PJ for both video sources (cable box and media player).
When I first connected both sources through the DVI inputs (via mechanical adapters), the cable box signal made it to the PJ fine, but the media player could not maintain the connection. I concluded that I needed more signal strength for the media player, and bought the Monoprice splitter/amplifier.
Here's the curious part of my story: When I first inserted the splitter/amp before the long cable run, it seemed to fix my problem. However when I tried again the next day, I would get a quick look at the player's splash screen before the picture went dark. I guessed that even more signal strength was needed and installed a second Monoprice splitter/amp at the PJ end of the cable run. Again it worked initially, but not the next day! This makes no sense to me, but many it will to someone else.
For now I have ordered a different HDMI booster/extender and will try it instead of the Monoprice splitter/amps. I probably bought the wrong gizmo for boosting the signal, as I don't need the splitter function.
My audio switching is done using optical connections, so the DVI/HDMI is just for video. I have no interest in 3D if anyone wonders.