Broken how? String broken? That is an easy fix. Search online and on this forum using the search function above. There are lots of posts about buying the kit and repairing them fairly easily and cheaply. If you want to do away with them and install mini blinds, that's another story, Take the valance down. Usually held in place with two or three screws, unscrew the day/night shades from the wall, install the brackets and put the blinds on. Reinstall the valances and your done. Pretty simple stuff. If your not that handy or unable to handle the job, hire a blind shop to come and do it for you.