Okay , just a re-cap , I had picked up a used big ben .. that the narrow lock light became intermittent, it was a cold solder joint on the board .. once re-flowed good to go ... So I'm making some changes in the home studio , I had purchased a Yamaha KX8 , weighted 88 key keyboard that supported USB and midi. As I was fully midi enabled , I just plugged it in and off I went .. okay a year later and I'm moving the keyboard over to studio B ... This time decided to run it via usb.. downloaded the usb/midi drivers and tried to install them no go ( computer could not recognize the device ...) I was totally stymied as to why this would not go , tried different usb cables, different ports , I could plug the USB in turn on the keyboard , a usb device was found but unrecognized.. was all the computer would spit back. it didn't make any sense at all ... even tried another computer no luck ... So what the heck, I took off the 30 screws off the bottom of the KX8 .. removed the board that the usb was attached to and flipped it over .. low and behold, the soldered pins were dull and dark ... Reflowed the pins and powered it up , computer found the keyboard on the first shot ... I'm smiling ... But I seem to be one that keeps getting product with bad soldering on the component boards ! ... This is about the 5th time this year I've been in the belly of some electronic gizmo reflowing solder . Anyhow, the KX-8 is now running along great in Ableton 9.6 .. now to get the novation push controller pad installed and the novation impulse controller keyboard installed as well and I'll be good to go ..