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.
- 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".
- I have checked the Voltage and I see 2.9v at VDD.
- Try to reset from J-LINK commander, not able connect to the board.
I also observe below issue.
- Power on the device, LED5 blink rapidly.
- 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.