6 Appendix B: PKOB4 Recovery Method

When the MPLAB PICkit On-Board 4 is not responding (in rare cases), the user can recover its operation by following these steps:
Warning: Only use this utility to restore the hardware tool boot firmware to its factory state. Use only if the hardware tool no longer functions on any machine.
  1. With the WBZ351 Curiosity Board still being powered, short the two pads for approximately 10 seconds.
    Figure 6-1. Location of Pads to Short
  2. Open the latest version of MPLAB X. For more details, refer to Software Prerequisites.
  3. Go to Debug>Hardware Tool Emergency Boot Firmware Recovery.
    Figure 6-2. Hardware Tool Emergency Boot Firmware Recovery
  4. Follow the directions on the screen. This resets the tool back to the factory conditions.
    Note: For more details, refer to How to Use the Hardware Tool Emergency Boot Firmware Recovery Utility.