A loose RV cabinet hinge is usually a small problem that turns into a bigger one if you ignore it, especially because the constant vibration from travel keeps working the screws loose. The first thing I would do is open the cabinet and inspect both the hinge and the wood around it. If the screws are simply backing out, try tightening them by hand with the correct screwdriver rather than a power driver. That alone sometimes fixes it, but if the screw keeps spinning or won’t bite, the hole is probably stripped.
If the screw hole is stripped, do not just shove in a bigger screw unless you know there is enough wood to support it. A better repair is usually to remove the hinge, clean out the old hole, and fill it with glued wooden toothpicks, bamboo skewers, or a hardwood dowel trimmed to fit. Wood glue helps the filler bond to the cabinet frame. After it dries, cut it flush, then reinstall the hinge with the original screw size or a screw only slightly larger if the wood around it is still solid. In most RV cabinets, the material is thin plywood or particle board, so you want to avoid splitting it with oversized screws.
If the hinge plate itself is bent, cracked, or worn, replace the hinge rather than trying to force it back into shape. Cabinet hinges in RVs are often inexpensive, and a fresh hinge can save a lot of frustration. While you have it off, check whether the door is pulling crooked because the hinge screws on the door side are loose too. Sometimes both sides need attention. If the door has dropped a lot, mark the hinge position before removing it so you can line it back up correctly.
For cabinets mounted into very soft or damaged wood, a more durable fix is to use threaded inserts or small machine screws with backing hardware if the design allows it. That is not always practical in an RV cabinet, but it is stronger than relying on the same worn-out holes forever. If the cabinet is a high-use one, like over the sink or near the entry, it is worth doing the repair properly rather than a quick patch.
A couple of practical tips: do not overtighten, because that can strip the hole faster or crack the face frame. Use a hand screwdriver for the final snugging so you can feel resistance. Also, check the other hinges on the same door while you are there, because one loose hinge can make the others work harder. If the cabinet keeps loosening even after repair, a small dab of removable thread locker on the screw threads can help on metal-to-metal parts, but it is usually not needed for wood screws.
