Changing the COM port of a Crystalfontz USB Display

This document describes changing the COM port of a Crystalfontz USB display.

This step is entirely optional. In most cases, the COM port that is automatically assigned by windows will work perfectly well, and there will be no reason to change the COM port. Do not change the COM port if there is not a compelling reason.

The drivers should already be installed, hardware connected and the new hardware wizard completed before you start this procedure.

This document is written using Windows XP. Other browers or operating systems will follow a similar pattern.

"Right-click" on the "My Computer" icon on your desktop, then select "Properties" from the drop-down menu.

The "System Properties" dialog box will be displayed. Click on the "hardware" tab near the top of the properties window.

Once the hardware tab is selected, click on the "Device Manager" button. The device manager will open.

Cick on the small "+" to the left of the "Ports (COM & LPT)" to expand the "Ports (COM & LPT)" branch.

The Crystalfontz USB display will be shown. Right-click on the Crystalfontz USB display line and then select "Properties" from the menu.

Once the properties dialog is displayed, click on the "Port Settngs" tab:

On the port settings tab, click on the "Advanced . . .":

The advanced settings dialog will be shown. click on the arrow of the "Com Port Number" drop-down":

Now you can select the new COM port number that you wish to use. Once the new COM port is chosen click on the "OK" button to apply the changes and close the advanced settings dialog..

Click on the "OK" button of the properties dialog. The device manager will still be shown, but it may not have updated to show the new COM port assignment. Choose "Action", "Scan for hardware changes" from the device manager's menu to force an immediate update:

Now the device manager will show the updated COM port. Once you have verified that the COM port is assigned as you would like, you can close the device manager.