Editing Psion Siena General Maintenance (section)

== The serial port carries everything ==

With no internal SSD bays, '''the serial port is the machine's only route in and out''' — PC connectivity, the external SSD or PC-Card drive, and the Travel Modem all go through it.<ref name="wpsiena" />

* '''Keep the connector clean''' and its cover closed. A dirty or damaged serial port effectively bricks the machine's ability to exchange data.
* '''The connector matches the [[Psion Series 3c|3c]]''', not the Series 3 or 3a.<ref name="wp3">[https://en.wikipedia.org/wiki/Psion_Series_3 "Psion Series 3"], Wikipedia. Source for the statement that the 3c serial port was changed to match the Siena's.</ref>
* '''Keep the accessories with the machine.''' Without the cable and the external drive there is no way to get data off a Siena.
* '''Keep the infrared window clean''', next to the serial port — it is the only wireless route.<ref name="wpsiena" />