Ink leaking from HP-882

I 've been shipping an HP-882 between locations twice a year for several
years, packed in the original shipping box, without any problems. The
cartridges were always left in place. Printing was always ok when the
printer was started up at the new location. This last trip some black ink
leaked out into the carton.

The leak was coming mostly from two points at the bottom the printer below
the cartridge parking area. There was still no problem printing; test
sheets were sharp with no streaking of either the black or color.

The area inside under the cartridge parking position looked pretty wet, but
I have
seen that before when there were no leaks. The print heads looked normal;
there was no smearing such as one might see when the cartridge itself is
leaking.

I'd appreciate any suggestions as to the possible source of the leak and the
best
way to stop it.

Marty