Ink or toner cartridges that have become dislodged from their proper place. The wrong paper size loaded in the input tray. Clogged printer head nozzles causing a build-up of blocked ink or toner. Blank pages in the document you're printing.
There are numerous possible causes for a printer that's randomly producing blanks. The most common ones are empty ink cartridges, improper cartridge installation, and congested nozzles. Driver and software issues can sometimes cause this problem as well.
If you print in mostly black, your black cartridge will naturally run out faster than the color cartridges. However, some printers will pull a bit of ink from the color cartridges when you are printing solely in black, just to keep them primed for future use.
Click the Properties button. The Properties dialog box opens. Check the options on the property tabs to make sure that the appropriate color options are selected. If there is a checkmark in the box by Print in Grayscale, click in the box to remove the checkmark, and then click OK.
How to identify a clogged nozzle. There are a few telltale signs that your 3D printer nozzle could be clogged. Material stringing, missing layers, clicking sounds in your extruder gears, and inconsistent extrusion patterns—specifically thin layers—are all symptoms of a partially clogged nozzle.
If your PC or the LCD screen on your printer is telling you that your ink cartridges are full but no ink is passing through to the paper, then it's most likely that you are dealing with a clogged printhead. Blurry documents and images that appear faded are also signs that it's time to remove the excess ink.
Manually push the material out of the nozzle, once it has fully heated up. The material should slowly protrude out of the nozzle. If it doesn't, this means your nozzle is clogged.
Reasons why your HP printer has ink but won't print
This may seem obvious, but it sometimes happens: first make sure your paper tray has paper in it. Misalignment, clogged printheads, faulty data communication or insufficient ink levels can also be sources of the problem.
If your printer is spitting out pages full of strange characters, symbols, or strange formatting, your inkjet printer drivers may be outdated, incompatible with your operating system or corrupt. Drivers are important to the proper function of your inkjet printer and it is best to check for updates regularly.
Ink cartridges can dry out over time. If they are sitting in your machine for an extended period, they will eventually dry up and become unusable. The simplest way to combat this problem is by printing more frequently or running regular cleans and ink tests to ensure the nozzles remain clean.
As a last resort I tried soaking the head in methylated spirits for about 15 minutes. Then I blew out the nozzles and basically the whole head with compressed air. I reinstalled the head and carried out a deep clean. Then I did a nozzle check and all was working like brand new.
Resetting HP Ink Cartridges. There is no reset button on an ink cartridge by HP either. However, the process of its resetting is similar to an entertaining game, and if done correctly, you'll be back to printing in only a few minutes. Remove your cartridge from the printer and refill it with ink if needed.
Early signs of the nozzle starting to clog are: The filament is not extruded out of the nozzle consistently. Printed lines look much thinner and sometimes not sticking to the build plate. The extruded filament is curling up and sticks to the nozzle when purged.
Soak the clogged misting nozzle or misting nozzles in white vinegar or CLR for at least an hour. Rinse the misting nozzle, flush your misting lines and mount the misting nozzles back into your misting system. If you cannot remember the last time you replaced your misting system filter, its probably time to replace it.
Print head cleaning consumes some ink. To avoid wasting ink, clean the print head only if print quality declines; for example, if the printout is blurry or the color is incorrect or missing.