Do not download from random Facebook groups or untrusted blogs. Recommended sources:
: The receiver will start the upgrade process and reboot automatically. Do not turn off the power during this time, as it could corrupt the device. Key Features of the SR-400HD Pro Capacity : Supports up to 5,000 channels.
Go to Menu → System → Audio Settings → Change “HDMI Audio” from RAW to PCM, or vice versa. Also check your TV’s audio output settings.