Playback Is Interrupted And Communication Does Not Work - Onkyo TX-NR545 Manual

Troubleshooting
Playback is interrupted and communication does not work
Cannot receive signals due to a bad connection. Shorten the distance
from wireless LAN access point or remove obstacles for a good visibility,
and try again. Place the unit away from microwave ovens or other access
points. It is recommended to place the Wi­Fi router (access point) and the
unit in the same room.
If there is a metallic object near the unit, wireless LAN connection may
not be possible as the metal can effect on the radio wave.
2.4 GHz band for wireless LAN may not be enough. Connect ETHERNET
port of the unit and the router via an Ethernet cable after selecting "6.
Hardware" ­ "Network" and changing "Wi­Fi" to "Off(Wired)".
When other wireless LAN devices are used near the unit, several issues
such as interrupted playback and communication may occur. You can
avoid these issues by changing the channel of your Wi­Fi router. For
instructions on changing channels, see the instruction manual provided
with your Wi­Fi router.