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+# `Error: no probe was found` error
+
+You may encounter this error:
+``` console
+Running probe-run --chip nRF52840_xxAA target/thumbv7em-none-eabihf/debug/hello
+Error: no probe was found
+```
+
+- It may be caused by the micro-USB cable plugged on the long side of the board, instead of the short side.
+- Check that the board is powered on. 
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