Thank you, ***** ***** open the printer again and remove all cartridges > Turn off the printer and disconnect everything
Check all the black cartridge in this location:
And make sure it is vented correctly:
You can use a pin to clear the vent if necessary.
Finally, make sure that any prepackaging has been taken off:
Now reinsert all cartridges, Unplug the printer sharply from the power outlet while it is still on > While the printer is off, press and hold the power button for 1 minute
Finally, while holding down the stop/cancel button (or just the power button if you don't have those), plug the printer back in, and power on the printer if it doesn't do so automatically, then try the diagnostic test page again and see if there is any black printing. If not please exchange the black ink cartridge for another one.However, if you still face the same issue, unfortunately this means the printhead will need to be replaced (Either the sensor that detects that particular black cartridge has failed, or that nozzle is permanentely clogged). I have seen this happen quite suddenly before, if the warranty is out, it may be more cost effective to buy a new printer, but you may certainly call 1-***-***-**** first to get a quote for this part.