: If the unit becomes unresponsive, you can perform a Factory Reset by holding "ZONE 2 CONTROL" and pressing "STANDBY/ON" on the front panel until "Clear" appears.

firmware update fixed these frustrating, ongoing problems. Keeping your receiver's firmware updated is the most critical step to ensuring stability and unlocking new features.

If your firmware update fails mid-process, don't panic. Try the following recovery steps:

This is the biggest win. Prior to the update, eARC was a lottery. Post-update, the VSX-934 now locks onto eARC signals from Smart TV apps (Netflix, Disney+, Plex) within 2 seconds.

The most critical fix addressed the HDMI board stability. The firmware updated the EDID (Extended Display Identification Data) management, allowing the VSX-934 to correctly "handshake" with both the source device (like a Blu-ray player) and the TV simultaneously. Users report that Dolby Vision and HDR10 signals now pass through seamlessly without the dreaded black-screen flicker.

Search for the firmware download page and download the latest .zip file.

: If the update via network/USB cannot be selected, ensure the audio source is set to "OFF" or wait for the system to fully initialize after power-on.

Perform a factory reset (turn unit off → hold down “TUNER EDIT” and press “STANDBY/ON”), then re-run the MCACC calibration.

While holding down the button on the front panel, press the STANDBY/ON button.

If your receiver is unable to find an update, it may be because the "Update Notice" setting is disabled. Go to System Setup → Miscellaneous → Firmware Update → Update Notice and set it to Enable .

: General "under-the-hood" improvements to prevent erratic behavior or freezing. Troubleshooting Update Issues