The audio works fine if you are looking for a music system. The HDMI board appears to be fried.

The INTEGRA DTR-50.3 7.2 Channel 135W amplifier board offers a range of audio outputs, including digital and analog formats, such as Dolby Pro Logic and Dolby surround sound. With 16 different audio inputs and outputs, this black amplifier, manufactured in 2010, is compatible with various brands like UNIVERSAL and ONKYO. It also features a built-in AM/FM tuner, a headphone jack, and a variety of speaker jack connections for easy setup. This versatile amplifier is designed for home audio systems and provides powerful 135W of power output in the amplifier class A.