So i have a big problem, 2 days ago before i stoped the printer i do the daily end of the day maintenance , on the next day i filled up my white inks ( i have 80ml carts) i want to pull the ink from dampers i pulled but nothing coming, okay i put back everything i start the printer i ran a power cleaning , and after a nozzle check 1 of my white was verry bad so i run another, after the 1 whole 1 channel disappeared so i check the lines, and i see i have to much air in the lines, so i tried again to pull from damper but not coming nothing no ink no pressure .. ( maybe im pulling wrong , never do this with dx7 damper idk how is working,) so after i checked the capping station i take out i cleaned out i suck with syringe the tubes everything works fine, so now i dont know what is the problem or how can i solve this issue if anybody know something please help me . thank you and sorry for my bad english :)