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?
Fixed, I think. I tried some more USB cables from different manufacturers. I have 6 cables. Three cables bring up the JLINK drive and three do not. For now I will write this off to a run of bad cables…
In this entry, 'rcosta', had the same USB problem:
I have just had the same problem.
Fixed, I think. I tried some more USB cables from different manufacturers. I have 6 cables. Three cables bring up the JLINK drive and three do not. For now I will write this off to a run of bad cables but both my nRF52832 and nRF52840 SDK boards work with three of my USB cables. This is a mystery since I have never had any issues with USB cables. Perhaps some of my cables are made for charging only.
Glad you found the issue.
Thanks for sharing the solution.
Be sure to let us know if you have any other issues.
With the original USB cable included in the pack, the nRF52840 DK is not working. I have tried with 4 USB cables; with 2 cables is working and with other 2 is not working.
I have Windows 10 Home 64 bits, processor based on x64, as occurred with 'rcosta', I don´t know if it could have some relation with this USB problem.
It is quite and unpredectible behaviour for me.
Maybe you could create a new ticket about this?
Wow!! I totally had the same issue. One USB cord got the DK to be powered up with the LED to flash but File Explorer didn't detect the DK. I read this post and used a different USB and by golly it works. Frustrating but hey it works now. :)