: If the unit becomes unresponsive, try a "Hard Reset" by unplugging it for at least 1 hour, then holding the power button on the unit (not the remote) while plugging it back in.

: Do not turn off the power during the update. The unit will automatically switch to once finished. support.harmanaudio.com Step 4: Restore Factory Defaults

After the reset, turn off the main power switch on the rear panel for 10 seconds before turning it back on. media.flixcar.com Troubleshooting Tips Update Fails

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