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.. _renesas-ra_troubleshooting:
Trouble Shooting
===================
Flash file system
-------------------
* MicroPython REPL prompt is not displayed.
- Re-program the MicroPython image file.
- Confirm serial port connection.
The connection must be crossed that the board TXD pin is connected with
USB-serial conversion's RXD signal pin.
- If the prompt is not displayed suddenly, try to do factory file
system boot mode as the final method. Please note that all files are removed forever.
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