Donny, this particular repair shop and repair technician (head technician) was not a nudnick. This repair facility was recommended by Steve Deming to me, and is also highly respected & used by the top pro musicians in the SF Bay Area. The technician worked closely with Yamaha USA on this job. Part of the problem is that Yamaha did not provide them a schematic of my keyboard, so the repair tech had to confer several times (at length) over the the phone with Yamaha USA in order to get the USB replacement part installed properly. Though I don't know the root of the problem, my local repair technician advised me that when he went to replace the USB port, the original factory USB port soldering joint was bad (cold solder joint). I trust that the replacement board was installed correctly according to Yamaha's (via telephone) instructions. It will be interesting to find out what Jason Lee at Yamaha reports back after he reviews the situation upon inspection. - Scott