
Troubleshooting
70
Problem: I have installed the USB driver from the CD but
when I plug the Prolific USB cable into my computer it is
not recognized. What could be the problem?
Solution:
There could be one of two problems: Either the USB cable
driver has not been installed correctly or you have a faulty
cable. To check this, do the following:
1. Make sure you are an administrator on your computer.
2. Unplug any devices that sync data between the device
and your PC, i.e. PDAs or digital cameras. If the icon for
the device appears in the notification area of the
windows taskbar (bottom right of the screen next to the
time display) right-click on the icon and exit the
application.
3. Run the USB cable installation from the CD. If you have
already tried to install the USB driver you will receive
several options. Select the remove option. Once the
driver has been removed, restart your computer
and
reinstall the driver from the CD.
4. Connect the USB cable to both the Pen and PC. Make
sure the cable jack is pushed all the way into the Pen
and confirm that you hear the last little 'click' when the
cable is fully inserted.
5. The Windows “Add New Hardware Wizard” should
appear and the complete the driver installation.
6. On your PC go to Start/Settings/Control Panel and
select System. Click on the Hardware tab and then
click on Device Manager.
7. Find Ports (COM & LPT) and check that the "Prolific
USB to Serial Comm Port" is listed.
If you can’t see the driver in the Ports list, try the following:
1. Try to reinstall the driver
2. Try using a different USB port. Sometimes the cable will
be recognized when plugged into one USB port and
might not be recognized on another.
If you follow the above process and the cable is still not
detected, contact support for a replacement cable.
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