Thanks for all the suggestions. I replaced C216, C217 and C112, then my piano is working fine. However, after I power cycle, there is loud static noise from two speakers. Key still make sound. No sure if a new part is broken or I accidentally touches something. Please help!
Moderator edit: New thread created from:
https://forum.allaboutcircuits.com/...-95-sound-problem-speakers-headphones.140229/
Moderator edit: New thread created from:
https://forum.allaboutcircuits.com/...-95-sound-problem-speakers-headphones.140229/