DOLBY CP-750 Digital Cinema Stereo Audio Processor Read

DOLBY CP-750 Digital Cinema Stereo Audio Processor.
It turns on and seems to work normally, but the outputs are not working properly.
It doesn\'t output a true flat signal. See the graph picture. It\'s supposed to be flat. And the surround back signals are very low. All the outputs are not true and inconsistent.
Internal power supply included. A label on the back shows it was replaced in 2020.
Most likely it has some type of hardware failure. One of the chips is getting hotter than it should be as well.
This should be purchased by someone for parts. A new power supply alone is $145. And the case/screen/buttons/etc.
Or it should be purchased by someone who knows how to diagnose and fix at the hardware level. It has some type of fault. I don\'t think it\'s the power supply.
Power cable included. No other cables or accessories are included.