Digital piano p105b not sounding

I had a problem with my sustain pedal not sustaining and when I open up the piano… the resistor was blown. I’m not sure what value is it.

I don’t have a circuit diagram to reference to. I did replace it with a 470 ohm resistor as I was told by an electronics person who looked it up for me. After replacing the resistor and reconnect the piano… the audio doesn’t seem to work now. No audio is coming out of the speakers nor is it working when I connect my DAW software to my piano. What could be the problem here? I need help. Thanks