Schlage single cylinder lockset won't release from the door
If you have an identical lockset, then you know exactly how many fastening screws there are. If removing them all doesn't loosen the cover plates, they must be held in place by adhesion to the door's finish. 

Using your sharpest knife, carefully cut the paint or varnish adjacent to the cover plates. Score it all the way round, the gently work the knife point under the edge of the cover. Be very patient and pry only a little bit at a time. 

You will improve with practice, so work on the inside cover plate first, leading to less damage around the outside cover to attract the attention of the HOA snoops.