Hi, I have a Jem 777vdy that I have had since 2008. It is in fairly poor condition. I have tried to get it set up but it seems to have absolutely no sustain, and the neck feels "drummy" as if the fretboard or scarf joint is delaminated. But there is no obvious delamination. Is there any reason why this could have happened? I have had numerous rg's and never had this issue.