sony home theatre

Hey- I am confused how to connect my laptop to my projector (Wzacto NEO ) (2 hdmi port)(1-arc 2- hdmi in) which says has ARC port and connecting it to home theatre I have Sony DAV-DZ350 which only has an hdmi ARC OUT so that I could get 5.1 Dolby digital plus I tried connecting everything...

My connection details HDMI out(ARC) from home theatre(Sony HT IV300) to TV(Vu QDV65)'s HDMI1 ARC My Airtel DTH's HDMI out to TV's HDMI 2 *There is no direct connection between the Home theatre and the Airtel DTH As stupid as it may sound, if I turn off my Airtel DTH, and I'm playing some...