VAVA 4K Projector playing a 4k ultra hd no sound

hi , we cant hear the 5.1 dts-hd master audio on the rambo first blood and the he terminator 2 judgment day 4k ultra hd
we have a few 4k blue ray discs that cant hear the main track at all …no sounds of anything cars others
in the film , the movie rambo first blood
and if we go into the other tracks we can hear the audio commentary only

and the other one is the terminator 2 judgment day 4k ultra hd
this one we get the movie sound track loud and then all silent
any ideas what could be wrong maybe a setting that was changed
one last thing having siriusxm hooked up is that ok to have plugin that only for music but not loud music eazy soft music

now starwars plays fine full sound …and et the exterrestrial if we put the sound to 2.1 we can her it in mono only …all other tracks we can hear but not the 5.1 main track !
thank you for your time

Hi @lovemovies We regret to hear you are having issues with your VAVA 4k UST Projector and for the late response. Would you be so kind to try to do a factory reset (Setting > General > Factory Setting) then check what is the firmware version installed.

If you have any further questions or concerns please email support@vava.com.