Jlink Drive not appearing

[jdarden]

I just purchased this unit and followed the setup instructions. I did not perform any flashing.  When I plug the usb into the computer the jlink drive doesn't show up in Windows 10.  Only the LED lights pulse slowly.  I followed all the tips at the link below but nothing is making the Jlink drive appear in windows.  Should I send it back to the place I ordered it from and ask for a replacement?  Thanks

nrf52840-DK

PCA10056

1.1.0

2019.9

https://devzone.nordicsemi.com/f/nordic-q-a/43013/q-nrf52840-dk-does-not-appear-as-a-removable-drive-named-jlink

[Øyvind]

Hello,
I assume you have purchased a new unit? No one has been tampering with it before you? From the link you provide, what did you try? I need more information regarding your issue.

• Have you installed the software from here?
• Have you tried to run
  

  nrfjprog -i

• Does it appear in Device Manager?
• Please ensure that the USB cable is not faulty.

Thanks 

Kind regards,
Øyvind

[jdarden]

Thanks. Sorry for the delay, was out of the office a couple days.

Yes, this is a new unit.

-Yes, I have SDK, command line tools, and segger installed

-yes, the command works but nothing is listed

-No

-I tried two different cables (1m and 10cm cables).  I tried on two different computers as well. VDD measures 3V with a DMM from what I can tell.

The LED still just slowly pulses.

Other things I checked from the link I provided:

-Double checked hardware settings:  SW9: VDD Mode, SW6: Default 

-Tried BOOTLOADER mode (holding down reset button and cycling power)

-Tried nrfjprog -f nrf52 -e

[Øyvind]

jdarden said:

Tried BOOTLOADER mode (holding down reset button and cycling power)

What happened when you tried this? This should give the behavior below.

jdarden said:

The LED still just slowly pulses.

 What LED is pulsing slowly?  If LED5 pulses, this indicates that the DK is in bootloader mode. The DK should be visible as a disk with the name BOOTLOADER in "My Computer". If so, then you should be able to drag the attached file to that folder and it will restore J-Link functionality.

 J-Link OB-SAM3U128-V2-NordicSemi 170724.bin

  Kind regards,
Øyvind

[jdarden]

Nothing happens from what I can tell.   

LED1 is pulsing slowly.  Nothing is appearing in My Computer

[Øyvind]

Ok, sounds like it's best to ask for a replacement. Where did you order it from?

-Øyvind

[jdarden]

Mouser

[Øyvind]

Ok, just contact them and get a new board!

Good luck with the new one! 

Kind regards,
Øyvind