Gradually keep the printhead to the left and right to ensure that the printhead fully seats in the carriage.As you keep the printhead into the carriage, it relaxes into the carriage as it seats. Insert the printhead back again to the carriage to reseat it.Keep the printhead back to its position, and then put down the carriage latch.Clasp the sides of the printhead, and slightly uplift the printhead without taking it out from the carriage.Releasing the printer avoids the carriage to move. Release the power cord from the back of the printer.Wait till the carriage is sluggish and silent before proceeding further. The carriage transfers to the left side of the printer. Put your fingers in the slot on the left side of your printer, and then pull it forward to open the cartridge door.Perform the given steps to reseat the printhead. If the issue continues, perform the next solution.If these steps fix your issue, you need not continue troubleshooting.Wait till your printer is sluggish and silent before you proceed further.
![hp officejet pro 8720 printhead appears to be missing hp officejet pro 8720 printhead appears to be missing](https://sc02.alicdn.com/kf/H0cc21a2b06ad43ac82955d4f4f2c7393R/221156315/H0cc21a2b06ad43ac82955d4f4f2c7393R.jpg)
![hp officejet pro 8720 printhead appears to be missing hp officejet pro 8720 printhead appears to be missing](https://blog.tonergiant.co.uk/wp-content/uploads/2017/02/Sad-HP-Printer-1.jpg)
![hp officejet pro 8720 printhead appears to be missing hp officejet pro 8720 printhead appears to be missing](https://i3.ytimg.com/vi/7H2bA8b8XHc/hqdefault.jpg)
As the printer is turned on, detach the power cord from the back of the printer.Wait for a while till your printer is sluggish and silent before you continue.Perform these steps to restart the printing device.