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I bought the above board
I checked the revision information with nrjfprog --deviceversion and it was revision 1
All functions including ble worked well
I bought the nrf52840 chip of revision 3 and removed the revision 1 chip of the above board and installed revision 3
But the ble function does not work
I ran the ble_app_blinky example of nrf5_sdk_17.1.0_ddde560 as is
The source codes of revision 1 and revision 3 are the same
The debug results show that all items proceed without error
Is there anything I need to add in revision 3?