Can anyone help my WF 7720 is giving error 031006 ,paper jam? no paper in it. the black ink was leaking out inside for some reason,Took all cartridges out and cleaned them,refilled black was fine not leaking . Reset all cartridges and got this error I had 13 x 19 paper in when I got the leak and no paper in trays so cant see how there can be a paper jam. I shut down restarted ,reset cartridges ,checked all places for paper jams ,left unplugged for 30 minutes, plugged back same thing. Please help/TY