|When you try to print a test page it should come back with a message saying it's printed or give an error. What does it say?|
Try different USB ports and a different USB cable. Disable the 'power off' function for USB ports:
"1) Go to your Control Panel > System > Hardware tab > and click on the "Device Manager" button.
2) In the Device Manager window, find the item or items labeled "Universal Serial Bus controllers." Open it, and double-click the first item called "USB Root Hub."
3) In the USB Root Hub Properties dialog, click on the "Power Management" tab.
4) "Allow the computer to turn off this device to save power" is checked by default. Uncheck this box, and click OK."