This is the standard method for older Pioneer models like the VSX-920. Pioneer VSX-920-K HDMI Playback Issues - Expert Solutions
The VSX-920 remains a fantastic receiver for a 1080p/3D home theater or a secondary zone music system. A successful firmware update breathes new stability into this classic unit. However, given the scarcity of files and the risk, we recommend exhausting all other diagnostic steps first. pioneer vsx-920 firmware update
The Pioneer VSX-920 is a mature, stable device. Unless you experience specific HDMI audio dropouts, leave the firmware alone. For most owners today, the best "update" is using it with optical/coaxial inputs for clean 5.1 audio from a modern TV. This is the standard method for older Pioneer