printer not printing black after refill — the fix they don’t tell you
printer not printing black after refill — the tiny vent fix that saves your sanity
printer not printing black after refill can feel like a cruel joke: the cartridge is full, the chip is reset, the nozzle cleanings run, yet your pages come out stubbornly blank. After days of trial and error (and a lot of head-clean cycles), the unexpected culprit is often airflow—specifically, a blocked or over-sealed vent hole on the cartridge. When the vent can’t admit air, the ink can’t flow; a vacuum forms in the reservoir and the printhead starves. The “weird fix” that finally works? Restoring that tiny vent. Why airflow matters more than you think
Inkjet cartridges are simple pressure systems: as ink leaves the reservoir through the nozzle/printhead, it must be replaced by air through the vent. I...