change all the consumables, dampers, captop, orings (cut off 1/16" of ink line at end where it contacts each new oring)
check the adjustment that verifies the head is seated squarely on the capping station
is there a change, when you lower printhead to the lowest position? (this seats the head a little bit deeper into the capping station [this was a good workaround for one of my older rolands, following a head strike against a media clamp])