Download video: How to fix a HP Printer, not printing black ink and missing colours.
Channel: John Kennedy
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To do this, you need to take out the printer head unit that holds the Ink Cartridges in the printer. This simply unclips from the printer. There is no need to waste ink trying to clean heads until you have done this as it adds to the build up of dried ink on the print head. Typically the black is first to go as this is the most used ink cartridge and excess ink drys around the head, blocking it when you need to use it after a period of little to no usage.
I spent hours going out of my mind trying to find a quick solution that didn't require buying anything from anybody. As it wasn't easy to find I thought I'd share it with you how I solved this problem here on YouTube. Hope it helps.
p.s If you are interested in print cartridges you can buy them here on the sponsored link.