Help Guide (Web manual)

Do not turn the receiver off until [MEMORY CLEARED!] appears on the display panel.
[174] Troubleshooting Error messages
PROTECTOR
The receiver will automatically turn off after a few seconds. Check the following:
There may be an electrical surge or power failure. Unplug the AC power cord (mains lead) and then plug in
the cord again after 30 minutes.
An over-current from the USB port was detected. Disconnect the USB device as prompted in the warning
message and close the message.
The receiver is covered and the ventilation holes are blocked. Remove the object covering the ventilation
holes of the receiver.
The impedance of the connected speakers is below the rated impedance range indicated on the back panel
of the receiver. Reduce the volume level.
Unplug the AC power cord (mains lead) and let the receiver cool down for 30 minutes while performing the
following troubleshooting:
Disconnect all of the speakers and subwoofer.
Check that the speaker wires are tightly twisted on both ends.
Connect the front speaker first, increase the volume level and operate the receiver for at least 30 minutes
until it completely warms up. Then, connect each additional speaker one by one and test each additional
speaker until you detect which speaker is causing the protection error.
After checking the above items and fixing any problems, plug in the AC power cord (mains lead) and turn on
the receiver. If the problem persists, consult your nearest Sony dealer.
[175] Troubleshooting
Error messages
UPDATE FAILED
While USB Update is performed, insert a USB flash drive on which the package file for updating the receiver
is saved, and then turn the receiver off and turn it on again.
While Network Update is performed, press
(power). If the problem persists, insert a USB flash drive on
which the package file for updating the receiver is saved, and then press
(power) again.
[176] Troubleshooting
Error messages
FAN STOPPED (for STR-ZA3100ES only)
Check that the ventilation holes on the top of the receiver are not blocked.