RS-232 port power on Mesa 3 Windows and Mesa 2

31 Dec 2024

This information applies to Mesa 3 Windows and Mesa 2 Windows.

For details regarding power to the integrated RS-232 port (serial COM port) on the Mesa 3 Windows or Mesa 2 Windows tablets refer to the user manual:

To restore power to the RS-232 port, try a 20-second shutdown.

  1. Disconnect the tablet from all external power, including the AC wall charger or a dock.
  2. Press and hold the power button for 20 seconds.
  3. Release the power button, and wait 30 more seconds for the electrical processes in the background to finish.
    The removable and internal batteries are electronically disconnected from the tablet, causing a complete shutdown.
  4. To power on the tablet, connect the batteries, attach to an external power supply, and press the Power key.
  5. Wait for a complete reboot, and then test the RS-232 port and utility.

If the RS-232 port is still not powered or missing,

  1. Open the Device Manager.
  2. Under Ports (COM & LPT), select and hold (right-click) the RS-232 port and select Disable device.
  3. Select and hold the RS-232 port again and select Enable device.

You can also try uninstalling and installing the RS-232 COM port, as described at RS-232 expansion control panel for Mesa 3 and Mesa 2 with Windows

An OS patch update was provided to fix an issue with the RS-232 port after a Windows Update had installed. If your unit has an integrated RS-232 port, we recommend installing the patch from the following links: