Okay, thanks. You don't have a separate RIP, so where Raphael says "RIP" you can read "printer".
1. Could you try printing a simple document consisting of an empty text box with a blue fill color and a black border? Does that produce any output on the Laserjet?
2. Please print a document to file using the same driver, open that file in a text editor, and copy-paste the first 20 lines to a new post in this thread.