Hello, I am experiencing an issue with my nRF52 DK. The target nRF52832 appears to be working, but the on-board debugger is not functioning. Symptoms: No power/debug LEDs turn on. Windows does not detect a J-Link device. nRF Connect Programmer does not detect any debugger. Device Manager does not show a J-Link or an unknown USB device. I have verified that the USB cable is working correctly. The on-board debugger IC (nRF5340) becomes noticeably hot shortly after USB power is applied. Could you please advise on additional troubleshooting steps to determine whether the issue is caused by a damaged debugger MCU, power circuitry, or another hardware fault? Thank you. Best regards, Gokul

nRF52 DK On-Board Debugger (nRF5340) Not Detected

Hello,

I am experiencing an issue with my nRF52 DK. The target nRF52832 appears to be working, but the on-board debugger is not functioning.

Symptoms:

No power/debug LEDs turn on.
Windows does not detect a J-Link device.
nRF Connect Programmer does not detect any debugger.
Device Manager does not show a J-Link or an unknown USB device.
I have verified that the USB cable is working correctly.
The on-board debugger IC (nRF5340) becomes noticeably hot shortly after USB power is applied.

Could you please advise on additional troubleshooting steps to determine whether the issue is caused by a damaged debugger MCU, power circuitry, or another hardware fault?

Thank you.
Best regards,
Gokul