Here's an old Gary story,... I had sold my Psr3000 to a fellow online,.....When it arrived at his house all was well shipped in original box but he called me and said that when he plugged in the headphones they didn't work!!!
.....which was odd as I thoroughly tested every feature out before I sent it to him as I would always do and it worked perfectly.
After trying a few things over the phone without success I called Gary Mr Wizard immediately,.....he suggested that the new owner open the KB up and take a look inside and to our amazement there was the problem,................somehow and someway the solid state circuit boar attached to the headphone input had a hairline crack which stopped the circuit and there was the problem,....
OH BOY NOW WHAT????? So I called Yamaha right away and ordered a New headphone circuit board input....meanwhile....
Not to worry Gary tells me have the owner pop out the circuit board and send it to him... Gary in all his high wisdom somehow
re-soldered the board bridging the crack and it worked perfectly again,....sent it back to the owner and all was well again. Additionally when the Yamaha part that I ordered came in I sent that as back up to the owner also he was more then happy and we all lived happily ever after,...and that is only one of the great stories about me and Mr Wizard...