I just tried to ask in another thread but have no answer at all.

Hello. I have the same problem on jtv69. It sounds very annoying when playing acoustic models and it noticeable in electric models too.  It has high frequency ring  I've tried to mute strings behind nut but there's no result. I checked springs in tremolo, but they're muted with ribbon-like material inside them. Is it bridge problem? When I hit it by nail I hear similar ring. Is there any way to mute it? Could you tell me what to do? Thanks.