uhhhmenono

my inlaw has 03 accord lx 4cyl with 30k and the ac quit working last week. i've check for charge in the system and it was empty, so i tried to fill it up with the 12oz cans. it reached 70psi on the low side with less than half a can. hooked up a 2 gauge manifold tester to it and it read 70psi on low side and 80psi on the high side. compressor never kicked on, checked for power to the compressor and it was getting 14v. the air coming out of the vents is warm.
what else can i test or look for before i replace the compressor?