I have 4 units of SDC2130 has not been used for a while. Recently took them out to power up, 1 of the 4 cannot be detected by the PC. Did the Pad 5 short the top most left and right connection, but to no avail, still don't work after I power cycle the board. All boards are powered external while USB is connected to PC. LED for the undetected card is red and blinking like normal.