There are many reasons that a projector may not be turning on. Please check the Power Point, check the Thermal Lamp light glowing or not if it is glowing it mean poor maintenance and the heat is not dissipating out, so bring it to service center.

Dolby atmos receivers require Dolby atmos speakers for producing the result to you
There are two types of speakers 

1. DOLBY ATMOS OVERHEAD SPEAKERS
2. DOLBY ENABLED SPEAKERS

DOLBY ATMOS OVERHEAD SPEAKERS
These speakers are unlike others speakers have specific dimension and construction to
Give you the required result, best atoms overhead speakers comes with tilt able tweeter
Inside that gives direction on higher frequencies delivered.

DOLBY ENABLED SPEAKERS
These speakers are placed above the tower speakers or front speakers that basically works on
Reflection. However loss on reflection is inevitable by absorption of the ceiling material used.

AV Receivers we use is signal driven and the maximum energy to be transferred to the drivers (speakers) where
Ever we install, copper is the best conductive material for better efficiency, we recommend
Best speaker cable with better specification for ultimate experience.

Dolby atmos installation is very crucial compared with normal 5.1 system installation,Speaker placement, calibration, crossover setting place crucial role in installation.