nRF5340DK IMCU Bricked

[AnujPathak]

Hi All,

I have a 5340dk and it got bricked for no reason, last night I was able to flash and debug my program. But when I tried this morning, device is behaving unexpectedly. 
LED 5 either turns on and goes off quickly, or blink for random duration and then goes off.
when it does blink I could get jlink detected popup once in windows. and then it goes off.
Sometime of led goes off after some random duration it could blink once too.

Hardware information:
PCA10095
2.0.0
2022.10

I have not modified any SB all switched are in default state.
I have also measure voltages on VDD_nRF which is 3.0v.

Regards
Anuj

[Kazi Afroza Sultana]

Hello Anuj,

Can you please try to run this command nrfjprog --recover and see the output?

Thanks.

Best Regards,

Kazi Afroza Sultana

[AnujPathak]

Problem is not the target MCU it is IMCU that seem to be in halt/reset mode and not booting segger jlink ob firmware

But following the output of recover command with DK connected

ERROR: No debuggers were discovered.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.

[Kazi Afroza Sultana]

Hi,

It seems like connectivity issue between the PC and the Jlink debugger. You may try to use another usb cable or different usb port on the pc.

[AnujPathak]

I have already tried 3 different USB cables (all cables working fine with 52840DK), on two different systems.
For reference before opening this ticket, I have already looked at all similar threads and tried every solution suggested in other threads

My issue is that IMCU either resets or not booting or is in halt

[Kazi Afroza Sultana]

Hello,

I have asked our team about this issue. I will get back to you whenever there is an update. We were lower staffed during Christmas vacation. Sorry for the late reply.

Thanks.

BR

Kazi