HP Photosmart C4380 printer (needs fixing) (Allerton L18)

This printer was working well until recently, but now the print is too faint to read (and it prints in blue, when black and white is selected). It looks to me as thought the print heads need cleaning, but the “clean print heads” option is greyed out. I’ve changed the ink cartridges recently, so I don’t think it’s a low ink problem.

The printer is not usable in its current state, but if you want to have a go at cleaning the print heads manually, you know what the problem is and how to fix it, or you’d like it for spare parts, then it might be the printer for you.