Korg Forums

Hi. Since some time, I can't exercise anymore over the mp3 songs I've loaded on my PA800 because it suddenly stops playing them when I press slightly stronger on the keys. The screen shows: "Detected/Removed USB device(s)" even if there's none. Looks something connected with aftertouch. Any suggestion? [/b]

The disconnected usb device must be the internal HDD (it uses the usb protocol to communicate with the board).
I would suggest to remove the 4 screws at the bottom and check the connection to the HDD (maybe you have a usb stick in there instead of an actual HDD)