Bricked PCA100028

[Paul]

I have a PCA100028 not working anymore. not sure what I have done to the board. I have a couple of other PCA100028's work well on the same computer. The program left on the board still turns LED1, LED2, LED3. LD5 (The led beside the SEGGER IC) is off.

If I hold BOOT/RESET button and power on, I got BOOTLOADER drive on my computer and LD5 will flash 0.5 second on and 0.5 seconds off. But after about 10 seconds, BOOTLOADER drive will disappear. LD5 still flashing.

It looks like the board is not totally bricked.

After reading through a few thread about recovery, I am still not 100% sure.

Thanks

Paul

[wlgrd]

I don't remember if the bootloader should exit after 10 seconds, but my procedure would be to first go to the download section here; www.nordicsemi.com/.../eng-GB

Download the nRF5x-OB-JLink-IF

Start the bootloader mode again, and drag and drop the nRF5x-OB-JLink-IF.bin onto the bootloader drive. Hope that works.

[Paul]

I checked Windows Device Manager, J-Link is under Other devices. Did uninstall the driver and rescan the hardware, couldn't solve the problem. I installed J-Link 6.10K. Didn't solve the problem. My other J-LINK debugger is working OK on this computer. Any hints?