The Harman Kardon AVR 151 is a networked audio/video receiver that supports software updates primarily via its front-panel USB port. Updating the firmware can resolve specific bugs—such as audio disruptions during gaming—but should only be performed if you are experiencing issues, as firmware updates for end-of-life (EoL) products can sometimes introduce new minor bugs, such as remote control inconsistencies. Essential Pre-Update Checklist
web.archive.org.https://www.harmankardon.com/software-updates/avr151.html.zip file named AVR151_FW_v210.zip.Updates were only released to fix specific bugs, such as: harman kardon avr 151 software update
HDMI/HDCP Limitations: No software update can upgrade the HDCP version. All / The Harman Kardon AVR 151 is a networked