1, caused by running out of ink cartridges. But most of the reasons are caused by nozzle blockage.

2, slight congestion, you can use the printer's own nozzle cleaning can basically be done. If the jam is serious, HP can replace the ink cartridge, while EP can only try to clean the print head.

3. The reason for color cast in printing is that the printer lacks a certain color or is caused by several colors. If the angle of the print head is not calibrated, it will also cause local color cast. Unqualified printing paper and ink cartridges can also cause such failures.

Second, the treatment method:

1. Re-edit the original image on the display, so that the printer can print the required color graphics;

There is no counting chip on the ink box of this printer. If the ink cartridge is taken out and then loaded during use, the printer will install a new ink cartridge by default, and the ink capacity cannot be measured correctly. If you do the above operation, it is possible that the ink will be used up now. Please change a new ink cartridge.

3. If the above operations are not carried out, clean 1-3 times first in case of color loss or disconnection. If the print head cannot be cleaned, please stop cleaning. Start the printer to check the nozzle the next day. If the color is still missing or disconnected, continue cleaning 1-2 times. (The principle is that after a period of time, the ink may wet the dry ink in the print head. If the problem persists, please contact an authorized service center.

Extended data:

Troubleshooting the printer:

Symptom: The printer has a print job, but it doesn't work.

1. If the printer still can't print normally, please turn off the power of the printer first and then restart the computer. This operation can make the computer in a normal use environment. After restarting the computer, send the print job again to print normally.

2. Clear the print job

Tasks that cannot be printed because the printer is offline or the printing background service program fails to process will remain in the print task list, which will cause the print queue to be blocked and unable to print normally. It is recommended to clear the unfinished print job.

3. Restore the printing status

When the printer is in "offline" or "paused" state, the printer will not print normally. To cancel all document menu items, you need to click the corresponding menu items respectively to restore the normal printing state.

4. Check the USB cable.

If the USB cable is not normal, you will not be able to print after sending the print job or the print job will disappear automatically. Because the laser printer needs a stable voltage environment to ensure the normal operation of the task, the USB port in front of the computer will cause insufficient power supply, so it is recommended to connect the USB port of the computer motherboard.

The attached USB cable is1.5m. If the USB cable is too long, it will cause communication problems and make the printer unable to receive printing tasks. It is suggested that the length of USB cable should not exceed 3m. If the sent print job still disappears automatically after checking the USB cable, please reinstall the driver. After clearing the print job, restoring the printing status and checking the printer port, you can try to send the print job again.

5. Reinstall the driver.

If the driver is not installed correctly, it will be impossible to print after sending the print job, or the print job will disappear automatically. Installing the driver in the same system for many times or not deleting the previously installed driver will cause the driver installation to fail and the printer cannot print, so it may not print normally after installing the driver.