The small printed circuit board that houses the headphone jack was broken. I had the buyer open the board, and the screws had come out of the PC board and the board had actually snapped in half. The board is not very expensive, and easily replaced. Hopefully, DNJ's service outfit, Russo Music, can take care of the problem quickly, and inexpensively.
Good Luck,
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)