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After power turn off and on. Chip is not working

Hi 

I made a custom board. (using nrRF52832) 

At frist, I tested my code on 52DK(PCCA10040). It is worked.

And then I tested my code on custom board.
I changed my code in <sdk_config.h>.
Because my custom board haven`t optional 32kHz crystal.

// <h> Clock - SoftDevice clock configuration
// <o> NRF_SDH_CLOCK_LF_SRC - SoftDevice clock source.


#define NRF_SDH_CLOCK_LF_SRC 0

#define NRF_SDH_CLOCK_LF_RC_CTIV 16

#define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2

#define NRF_SDH_CLOCK_LF_XTAL_ACCURACY 7

I used my custom board well.
(mpu6050 sensor(accel,gyro) + BLE)

But, Now my board is not working.

When <Build and Run> click in SES, it is works.
Sending for sensor value to BLE.

After <Build and Run>, I disconnected the j-link. and I connected power supply to 3V.
But It not works. Why?

(When connected to a power supply, the current shows that 0.008A is being applied. But Bluetooth is not advertised.

I found that there were a lot of problems with custom board such as Uart or Log. Therefore, they were all disabled.)

Let me know what part of what I'm missing.

Thank you for reading.

ps.  I used download to 52Dk board. 

*Additional information*

I have a another computer(laptop).
and I have saved code in the laptop before problem.

So, I try the download for my custom board. but, problem is the same.

When I Debug or <Build and run>, It is sending the value to BLE.

but, When a custom boards turn off and on, it is not works.(switch on/off)

I think.. maybe sensor has broken?

so, I have 15 custom board. (spare)
I try other.

but, still not working.

Why?

Even....

Custom boards that previously downloaded code work well when powered on.

However, when I put the code back in, it doesn't work the same way.

I don`t know what I wrong ....

please help me. 

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