Onkyo TX-RZ3100 User Manual page 55

If the USB storage device has been partitioned, each section will be treated
as an independent device.
5. Press on the remote controller.
The Setup menu is displayed on the TV screen.
6. Select "7. Miscellaneous" ­ "Firmware Update" ­ "Update via USB" with the
cursors in order, then press ENTER.
If "Firmware Update" is grayed out and cannot be selected, wait for a while until it
starts up.
You will not be able to select "Update via USB" if there is nothing to update.
7. Press ENTER with "Update" selected to start update.
During the update, the TV screen may go black depending on the updated
program. In that case, check the progress on the display of the unit. The TV
screen will remain black until the update is complete and the power is
turned on again.
During the update, do not turn off, or disconnect then reconnect the USB
storage device.
"Completed!" is displayed when the update is complete.
8. Disconnect the USB storage device from the unit.
9. Press ON/STANDBY on the main unit to turn the unit into standby mode. The
process is completed and your firmware is updated to the latest version.
Do not use on the remote controller.