There can be numerous numbers of technical or non-technical reasons as to why HP Printer won't Print Black. To fix such kind of issues completely from the root, you should make sure that you are using original ink cartridges in your printer. If you come across faulty cartridges or the ink cartridges are showing low ink level, you should replace it as quickly as possible. Apart from that, if you are coming across the same problems, you should clean the printhead. On the other hand, you can also opt for the expert’s backing from the reliable source to deal with such issues.