If they are wood, take a hinge and see why its loose, or what is. If screws just came out and hinge turned loose, try removing an existing one to get several that size, and several of the next size up, thickness that is, to handle any that may have stripped out.
If the wood itself is damaged beyond a little paint and a few screws, you might take one by a cabinet shop in the area for an estimate to repair/remake one/2/3,
even with new or repaired, they will have to be reinstalled, so ya might snap a pic of factory alignment/connections at hinges.
__________________
|