The printhead missing issue is often reported by HP printer users. But it is not a major issue, and you can resolve it with the following HP OfficeJet Pro 8620 Troubleshooting steps. But first, make sure the printhead latch is securely closed, and the cartridges are installed correctly. Now, try out the given steps to fix the HP OfficeJet Pro 8620 printhead missing problem.

• First of all, try resetting your HP printer. Turn off your printer, remove the power cord and wait for a few minutes. After some time, plug in the power cord and turn on your printer.
• Faulty drivers can also be responsible for the printhead issue. So, make sure you are using the updated version of your printer driver.
• Cleaning the ink cartridges can also resolve the printhead missing error. So, clean your ink cartridges with a dry cloth and check if the issue is now fixed.
• If nothing helps, reseat your HP printer's printhead.