possible nRF52840 DK BLE module failure

[masterLee]

Hi,

I use two nRF52840 DK for testing purposes for over 1.5 years now.
Suddenly, yesterday the BLE module in one of the DK's stopped working. Just like that.  Same  functional code, same everything.

The program always freezes inside ble_stack_init() when I run the program with the debugger, at the following point

SVCALL(SD_SOFTDEVICE_ENABLE, uint32_t, sd_softdevice_enable(nrf_clock_lf_cfg_t const * p_clock_lf_cfg, nrf_fault_handler_t fault_handler));

Then I tested the same code with my second DK and it works fine. So I assume that somehow the nRF52840 IC of the first DK is damaged ..

Any ideas ?

[Amanda Hsieh]

Hi, 

The HFXO crystal is required for the Softdevice. Maybe you could change the oscillator to test. See this post. 

Regards,
Amanda