As well as the laptop screen, I am also using an LG Flatron. Reboot or hard boot will restore it, for a few mins. However, I recommend turning the visibility of extensions off, as many users might not be able to deal with them.
By following a few simple steps, you can paint rendered concrete and enjoy a whole new look. If you havent already done so, make sure your data has been backed up by using the BlackBerry Desktop Manager before going ahead and moving onto the first step. I have set it up to Extend Displays with the LG monitor being the primary display. I've tried reinstalling Catalyst, resetting to default, and changing resolutions.