Excuse me, what happened when HP Z5200 photo machine printed pure black and faded? It is normal about 5 cm before the ink is discharged from the nozzle, and then it begins to appear one after another.

Hello, thank you for choosing HP products.

Excuse me, did you align the print head with plain paper after the machine went wrong? According to your question, the reasons involved are: 1, the print head itself is faulty, so it is suggested to try to replace the print head when the alignment of the print head is invalid. 2. Does the machine use original HP ink? If alternative ink is used, it is recommended to try to replace the original HP ink for testing. 3. Excluding the above two points of information, it is necessary to further test the pen container. If the pen container is out of order, it will sometimes cause what you call failure.

I hope the above reply can help you.