Repairing a single side hinge depends on whether it is for a laptop, a door, or a cabinet.For laptops, carefully unclip the bezel and back cover to access the broken mount. Tighten the hinge mechanism, or use epoxy/CA glue and baking soda to rebuild broken plastic anchors. For doors and cabinets, drill out stripped screw holes, insert glued wooden dowels, and re-drill the pilot holes.