Device stopped working (Error: Device not detected)

[Jithin A]

Hi,

I have 2 nrf52840-preview dk board. All of a sudden both the devices are not working any more.

I have referred to some suggestions and tried all the below cases and still no use.

1. Hold IF BOOT/RESET and unplug/plug, the device should be detected as BOOTLOADER, in my case it is still showing "USB Device not recognized".
2. I have checked the Voltage and I see 2.9v at VDD.
3. Try to reset from J-LINK commander, not able connect to the board.

I also observe below issue.

1. Power on the device, LED5 blink rapidly.
2. Hold IF BOOT/RESET, unplug and plug, the LED5 blink slowly (may at interval of ~1 sec).

Please help me to retrieve the device to normal.

Thank you in advance.

[Kenneth]

Hello,

I have 2 nrf52840-preview dk board.

If you have old PDK's of the nRF52840 (prior to v1.0.0) these are no longer supported. The problem you refer to typically indicate problem with the USB connections (e.g. using a USB cable meant for charging).

Kenneth

[Jithin A]

Kenneth said:

If you have old PDK's of the nRF52840 (prior to v1.0.0) these are no longer supported.

--> I have one with v0.9.1(preview DK) and the other v1.1.0 (nRF52840DK, not preview). So, does this means the one with v0.9.1 does not work anymore?

 

Kenneth said:

The problem you refer to typically indicate problem with the USB connections (e.g. using a USB cable meant for charging).

--> I tried changing USB cable (3-4) and the same result.

The major improvement is with v1.1.0 is below:

• I was able to connect with the PC and reset, I get BOOTLOADER connected and after I upload the J-Link bin I get J-Link connected.
• The issue is I see J-Link in NRF-Connect App and not the board info(nRF52840DK).

Can you please help me with this as we are working on some project and they are using the 52840 variants, so these boards are really need for us. It would be great if 1 works for us.

Thank you, appreciate your support.

[Kenneth]

You can try to download nrf Command line tools and see if you are able to call 'nrfjprog --recover' from a command line:
https://www.nordicsemi.com/Products/Development-tools/nrf-command-line-tools/download 

Are you sure there have been no modifications to the nRF52840-DK (e.g that you possible have cut any solder bridges or similar).

Don't use the PDK no, it's not supported. Even if you were to make it seemingly work, it should not be used.

Kenneth

[Jithin A]

Thanks that worked.

It did not work at first, I repeatedly tried to upload J-Link bin to BOOTLOADER and reset using nrfjprog.

At second time it worked. It is now showing nRF52840DK.

Thank you once again.

[1821559556]

Jithin A said:

一开始它不起作用，我反复尝试将 J-Link bin 上传到 BOOTLOADER 并使用 nrfjprog 重置

Hi, I have the same question as you, I would like to ask what is the exact step ticket for this and what is the J-Link bin? I can't execute the g command directly now because it says ERROR: No debuggers were discovered. How can I mourn?