It originally stuck in my Canon pixma mx922 to replace pgbk 250 pgi-250 but my printer said there was nothing there. I restarted my printer and it said there was something in the slot but it didn't print. It's essentially a placeholder to override the use of pgbk. Really lame and expensive is not possible. I even tried a deep clean, head alignment check and many injector samples (pgbk test) and nothing helped.
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