So I had what I thought was the genius idea of buying a Chrome Cast to hook up to my old projector for instant Netflix et al. cinema in my living room, it's all set up... screen, speakers everything but there's just one small problem, no picture.
The reason it isn't straightforward forward is that my projector is old enough not to have an HDMI port, though it does say that it supports HDMI on it's DVI port using an adaptor. (Which I can't find). Also of course I'd have no sound.
What I have...
So with a little research I bought this HDMI to VGA + 3.5mm Jack Audio Cable Video Converter Adapter, I also bought a couple of gender changers, one VGA and one HDMI to get the whole lot to stick together.
The projector is an Optoma ThemeScene H57, so quite old but actually pretty decent (hence reluctance to take the plunge on a new one and also because this was supposed to be a cheap project)
What is happening...
What I'm experiencing is a black screen, which I am now attributing to HDCP problems... the projector scans and detects that there is a source plugged in the way you'd expect and looks like it's gone through the process of adjusting to that source signal and then just happily displays a black screen. Occasionally it also says "Out of Range". The sound comes out garbled when trying to play netflix or youtube.
I have tried it with a VGA to DVI adaptor into the DVI input to witht he same result.
I have also tried plugging my Nexus 10 into the HDMI input on the convertor, this yields a different result, white static, but still no picture.
The projector does work... it's even briefly displayed a chrome logo when I tried factory resetting the Chromecast while it was plugged into the projector (via the adaptor obviously) but then just returned to the black screen.
A weird caveat to all this is if I play something on Play Music then I still get a black screen but the sound comes out fine.
What I plan to try
I read that HDCP can cause problems like this and that it can sometimes be fixed using a powered HDMI splitter. Apparently this negotiates the HDCP handshake with the Chromecast and then passes on the signal to the two output ports, which sounds a bit dodgy, why is it so simple to bypass? Plus it's £30 for one of those which means my cheap project is getting more and more expensive.
Any help on this would be really REALLY appreciated. Please.