nRF52840 stops working after replacing ANT pin passive components

[Superciuk]

Hello,

We have built a device that uses the nRF52840 reference design shown below. With the configuration shown the board advertises as expected. If we replace either of the components on the RF front-end (C4, L1, C13 and C14) using a soldering station, the board stop advertising and even after reprogramming the DUT become unusable. Has anyone experienced this problem?

Any suggestion?

Thank you,

Fab

[Priyanka]

Hi,

Could you send pictures of the board?

One,  of a board that you haven't modified and other one, a picture of a board that you have modified.

With close up of the section around the nRF52840, so that it is possible to see some details.

-Priyanka