I managed to forget to remove the air vent plug on the glossy black R3000 ink cart. I printed a page and in the middle of the page the black stopped printing. I realized my mistake and removed the air vent plug. Now the glossy and matte black does not print. My matte black is an original epson cart.
I tried to make a custom black with Quadtonerip. I have also tried head cleaning.
The first test prints had some grey, then nothing. Completely white.
Is there anything to try? I have a PiezoFlush.