Hp all in 1 colour ink jet domestic model - black won't print

All  3 colours print. Black won't
Cleaned twice inc thourough deep clean
Ink shop say black is full

Can I clean inkjet with cotton wool sticks and isopropyl alcohol ?
fcekAsked:
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rindiConnect With a Mentor Commented:
Pour some warm (or hot) water into a flat dish and then put your cartridge in there. Make sure the water doesn't reach the copper contacts. It should only soak the ink output nozzles. Allow the cartridge to stand in there for a while, then wipe it dry and try printing again. You can repeat this step a couple of times.
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Andy MConnect With a Mentor IT Systems ManagerCommented:
I assume that the cartridge your using is a proper HP ink cartridge? I've know some third party inks to have issues on occasion (ink too thick or thin). If you touch the ink cartridge itself on the ink hole does ink come out of it at all?

The other possibility is the print head is going in the printer. I had a similar issue with a home printer a few months back - two colours printed fine but the black and the other colour would not print very well if at all.

As per Rindi's response best trying to clean it first. If this doesn't help I'd suggest contacting HP to see if you can purchase a new print head (or get another if it's still under warranty).
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