Yamaha RX-V765BL Owner's Manual page 72

Troubleshooting
Error message
W-4:CHECK PRNS
68
En
Cause
Presence speakers were not detected
during measurement with "Extra SP
Assign" set to "Presence."
Remedy
Check the presence speaker connections and perform
measurement again.
If presence speakers are not connected, set the
"Extra SP Assign" to other than "Presence."
If presence speakers are connected, set the "Extra SP
Assign" to "Presence," and retry the automatic setup
procedure.
See
page
47
47