Before you begin, it is important to identify your current software version to see if an update is even necessary.
Updating the Harman Kardon BDS 570 firmware is a process aimed at improving performance, fixing software bugs, and occasionally adding functionality to this 5.1-channel Blu-ray disc system. The Update Process harman kardon bds 570 firmware update
The Harman Kardon BDS 570 does support over-the-air (OTA) updates via Ethernet. The Ethernet port is for streaming audio only, not firmware. You must use a USB drive. Before you begin, it is important to identify
You can update your unit using a standard USB memory stick (internal flash memory) or potentially through an online connection if your network settings allow. The Ethernet port is for streaming audio only, not firmware
After the reset, turn off the main power switch on the rear panel for at least 10 seconds before turning it back on. BDS 270/BDS 570 - Harman Kardon