Ink Spillage
Never remove a paper jam if you don’t know how to. Forced yanking will not fix the printer - it will tear the print head and cause black ink to run all over the printer stand and possibly the carpet. Thankfully black ink is water based and easy to wipe. Unfortunately it’s harder to wipe off your hands.
I came home yesterday to a post-it on the printer saying something along the lines of ‘malfunction, paper jam’. Sure enough, someone (I won’t say who) had tried to yank the paper out of the printer without knowing what the heck was going on, had destroyed the black ink cartridge print head, causing all 42mL of get black ink to stream out of the printer. It was bleeding ink.
Thankfully the printer is an HP, the 930C. Old-ish printer but has served us faithfully for many years, and it’s still going. A quick visit to the hp support website gave the answer (well, with a bit of tweaking). And now we have a fully functional, albeit dirty, inkjet again.