Really good projector with problems which are Hausgemacht

The Beamer is absolutely top!
From her picture, I am absolutely satisfied.
Volume is when you directly underneath sits, audible if you concentrate on it. (Economy mode) In normal operation, much louder, that would be me then zuu loud! For me, the save modes is sufficient :-) ... No wonder at 3000 ANSI lumens.

Now the star deduction ... it's actually an impertinence of BenQ to provide a projector, which is guided on the BenQ page under "home entertainment", the support cables as BenQ Support max 3m HDMI.
Now the support, however, has offered me my projector to send an order to stop playing fix a software update to ddieses problem.
After some time, the projector always lose the source and looking new. Does will hang together with the polling interval of the EDID signal. I must, however, send in my Beamer for a firmware update .... is again such a thing ...

By the way ... with me helped neither HDMI Repeater yet 4x Shielded HDMI Cable for expensive money!
I will tell whether this will now fix my problem.