Sony STR-DN1080 Manual page 206

[282] Troubleshooting
Cannot play copyrighted files.
Audio content with DRM (Digital Rights Management) copyright protection cannot be played
on this receiver.
[283] Troubleshooting
Cannot select a previously selected track.
The track information may have been changed on the server. Refresh the server list and
then reselect the server.
[284] Troubleshooting
Controller devices or applications on the home
network cannot connect to the receiver.
Confirm that the network is correctly set up.
Your smartphone/tablet may be set to [Block] in [Home Network Access Control], or not
added to the list. If the maximum number of connectable devices has been exceeded, delete
unnecessary devices from the device list and then set [Auto Home Network Access
Permission] to [On].
Server operation of the receiver is suspended if the receiver is conducting one of the
following operations:
Playing content stored on the server (the receiver is operating as a player)
Updating the software
Displaying setting screen
[External Control] may be set to [Off]. Set it to [On] to allow a home automation controller to
connect to the receiver.
When using Video & TV SideView, also see "Cannot control the receiver using a Video & TV
SideView device."
When using SongPal, also see "Cannot control the receiver using a SongPal device."
[285] Troubleshooting
The receiver cannot be turned on by devices on a
network.
Set [Remote Start] to [On] if you want to turn the receiver on by operating the devices on a
network (for USA, Canadian and Asia-Pacific models only).
Home network
Home network
Home network
Home network