I can't connect PCA10040 to PC

[Roger01]

I'm using PCA10040 to test nRF52832.

But I can't see J-link device after connecting USB.

I installed J-link(segger), nRFgo studio, nrf command. But I can't see my PCA10040 board.

I can see J-link device if I connect J-link equipment as below.

But I can't find J-link device if I connect PCA10040 as below.

What could be  the problem?

I need your help.

[Vidar Berg]

Hi,

Does the LED next to the Segger chip (LD5 on silkscreen) light up when you connect the USB to the board? I see from your 2nd screenshot that the debugger SN is not even showing up so I'm wondering if the Jlink is getting power. Have you tried with different USB cables?

[Roger01]

Oh! It was cable's problem. thank you very much.