tx-nr616 hdmi out sub no picture

Hello everyone,

I've a problem unseen in several forums :
I've two monitor, so one on the main hdmi out and the other one on the hdmi out sub.

I can't display a picture on the hdmi sub without my tv on main is powered.
But on the hdmi sub,the tv doesn't display "no signal", something is well received, but don't displayed !

Somebody can tell me how to fix that ?

I already tried with Rihd on/off, passthrought or not and so far...

Thanks for help