Unable to connect j-link on nRF9160 custom board

Does anyone have some troubleshooting tips for how to test a custom board with nRF9160.

It is a new design, the schematic is based on the DK, including the j-link/swd connector.

We have a 3V3 supply.

I have been wondering about the inversion of the SWD RESET signal on the DK board so we implemented the schematic with both inversion and direct connection just to be sure. I assume connection of SWD nRESET signal to pin 32 throuth a 1k resistor with a capacitor is how it should be. 

Is the a guide on checking the CPU bootup etc...?

I have tested by J-Link on the DK by powering it through the external power connector and using the P18 connector. On the DK my J-Link interface connects.

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  • Currently I am powering it using the 5V output from the J-Link, there is a 3V3 regulator on the board. The board is 230V powered normally.

    I am measuring 3V3 from the power supply and on the VDD_GPIO pin. Measured on C7.

    On VDD_NRF net I am measureing 0V or actually 25mV.

    I am measuring this voltage (25mV) on a the involved components and also on both sides of the L1. Also on the ENABLE pin 101.