Bought a used unit and was this morning attempting to set it up.It seems that the phone app does not have all the functions of the ir remote but in any event using mainly the remote I have updated firmware but when I try to setting up surround sound it goes through the speaker setup and feedback but at the final stage,the message "Error" is displayed on the AVR sctreen.Also dont seem able to get an on screen (TV)display and unfortunately the instruction manuals were not supplied. Please help with how I go about setting up this unit.