However, the investigator was only able to read data from the serial port; the

investigator was unable to send key events via the serial port so the U-Boot

console could not be accessed in that way.  The investigator did find another

way of accessing the U-Boot console, though, which was used to complete the

U-Boot installation and verification.  The likely issue with the serial port was

initial mis-wiring of the serial connector, causing the receive pin to be

permanently disabled.  Here are the steps the investigator tried, including the

alternate method of installation that did not require the serial console: