My HP5520 has stopped printing black ink. so far i have:
Changed the ink, twice;
Cleaned the print head using the printer 'clean print head'
Physically removed and cleaned the print head with water/cleaner
Replaced the Printhead with new one
changed the ink again
It's still not working. and there isn't a trace of black ink coming out...is this a case of printer in the recycling?! On a sub note, there seems to be a LOT of black ink pooling in the cartridge 'resting' area of the printer - i don't know if this is relevant?