Improvement Point: Reduce soundbar volume
Upgrade Method:
1. Copy the attached software file to the USB flash drive (no other software or songs should be included in the USB flash drive)
2. Power on the machine and start it up - in any functional state - insert the USB flash drive - the characters on the display are garbled - a black screen will appear on the display for about a few seconds - the machine will restart after about 5 seconds. The Bluetooth mode displays the "bt" character - indicating a successful upgrade (Note: During the upgrade process, the machine cannot be powered off or perform any operations to prevent it from crashing)
3. After the upgrade is successful, power off and then on again!
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