Onkyo TX-L20D Manuel D'instructions page 45

> Before Start > Part Names
0 Do not use Í on the remote controller.
If an error message is displayed: When an error occurs,
"＊-＊＊ Error!" is displayed on the display of this unit. ("＊"
represents an alphanumeric character.) Check the
following:
0 ＊ -01, ＊ -10: USB storage device not found. Check
whether the USB storage device or USB cable is
correctly inserted to the USB port of this unit.
Connect the USB storage device to an external power
source if it has its own power supply.
0 ＊ -05, ＊ -13, ＊ -20, ＊ -21: The firmware file is not
present in the root folder of the USB storage device, or
the firmware file is for another model. Retry from the
download of the firmware file.
0 Others: Disconnect then reconnect the AC power cord,
then repeat from the beginning.
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> Install > Initial Setup > Playback
Advanced Setup | Firmware Update | Others
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