HP Jornada 540 Series User Manual page 35

When you remove your HP Jornada from the cradle, hold the cradle down with
one hand, and gently lift the HP Jornada with the other to avoid putting stress
on the connectors.
Connecting by sync cable
If a sync cable was not included with your HP Jornada, you can purchase
either a serial or USB cable as an optional accessory. For more information,
see the HP Jornada Accessories Guide.
To connect by sync cable
1. Connect the sync cable to a serial or USB port on your desktop PC.
Chapter 3 | Connecting to your desktop PC | 31