Sony STR-DN1070 - List of Messages after Auto Calibration Measurements; The Receiver Is Turned off Automatically

[222] Troubleshooting Error messages
An over-current from the USB port was detected.
Disconnect the USB device as prompted in the warning message and close the message.
[223] Troubleshooting
Error messages
List of messages after Auto Calibration measurements
Code 30:
Headphones are connected to the PHONES jack on the receiver. Remove the headphones
and perform the Auto Calibration again.
Code 31:
Front speakers are not selected properly. Select the front speakers using SPEAKERS on
the receiver and perform the Auto Calibration again.
Code 32, Code 33:
Speakers were not detected or not connected properly.
None of the front speakers are connected or only one front speaker is connected.
Either the surround left or surround right speaker is not connected.
Surround back speakers or front high speakers are connected even though surround
speakers are not connected. Connect the surround speaker(s) to the SPEAKERS
SURROUND/ZONE 3 terminals.
A surround back speaker is connected only to the SPEAKERS SURROUND
BACK/BI-AMP/FRONT HIGH/FRONT B R terminal. If connecting only one surround
back speaker, connect it to the SPEAKERS SURROUND BACK/BI-AMP/FRONT
HIGH/FRONT B L terminal.
Either the front high left or front high right speaker is not connected.
The calibration microphone is not connected. Make sure that the calibration microphone
is connected properly and perform the Auto Calibration again. If the calibration
microphone is connected properly but the error code still appears, the calibration
microphone cable may be damaged.
Warning 40:
The measurement process has been completed and a high noise level has been detected.
You may be able to achieve better results if you try the process again in a quiet
environment.
Warning 41, Warning 42:
The input from the microphone is too large.
The distance between the speaker and the microphone may be too short. Set them
further apart and perform the measurement again.
Warning 43:
The distance and phase of a subwoofer cannot be detected. This may be caused by noise.
Try performing the measurement in a quiet environment.
[224] Troubleshooting
General
The receiver is turned off automatically.
[Auto Standby] is set to [On] in the [System Settings] menu.
The sleep timer function was activated.
[PROTECTOR] was activated.
[225] Troubleshooting
General
Cannot find an available input when connecting