: 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.
: If the update doesn't complete, re-download the file and try a different USB stick. System Frozen Harman Kardon Bds 570 Firmware Update
: 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 : If the unit becomes unresponsive, try a