The PDK does not show up in file explorer. Power switch in VDD position. LED 1 is on solid. The device manager universal Serial Bus controllers does not list any device that looks like the Preview SDK board. I have changed to a different computer, swapped out the USB cable, switched HUBs. LED 1 is slowly pulsing with brightness change and buttons change which LED is pulsing. LED 6 is flashing rapidly. Any idea's on what I can do to get the JLINK drive showing again?