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도움말

원문 게시자: John Howard ,

제목:

All B,C, C# & D# keys on my keyboard have no sound. Help!

본문:

The B,C, C# & D# keys have no sound.  The keys stopped working across the all scales of the keyboard.  All the D,E,F,G,A keys work fine. It is just the B,C, C# &D# keys that have no sound. This keyboard has less then 10 hours of use.

기기:

Yamaha YPG-225

현황:

open