Thank you for posting on the HP Support Community.
Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:
Have you done any hardware changes in the printer?
Are you using genuine HP ink cartridge?
However, I suggest you do a Hard Reset
(1) Turn the printer on, if it is not already on.
(2) Wait until the printer is idle and silent before you continue.
(3) With the printer turned on, disconnect the power cord from the rear of the printer.
(4) Unplug the power cord from the wall outlet.
(5) Wait at least 60 seconds.
(6) Plug the power cord back into the wall outlet.NOTE: HP recommends connecting the printer power cord directly to the wall outlet.
(7) Reconnect the power cord to the rear of the printer.
(8) Turn on the printer, if it does not automatically turn on.
The printer might go through a warm-up period. The printer lights might flash, and the carriage might move.
Wait until the warm-up period finishes and your printer is idle and silent before you proceed.
Remove the ink cartridges:
Removing the ink cartridges and checking for an error message can help diagnose the printer issue. Take the ink cartridges out of the printhead, and then check the printer control panel or computer for an error message.
Open the ink cartridge access door.
The carriage moves to the left side of the access area.
Wait until the carriage is idle and silent before proceeding.
Push in on the front of one of the ink cartridges to release it, and then pull the ink cartridge toward you to remove it.
Figure : Removing the ink cartridge
Repeat these steps for the other ink cartridges.
Close the ink cartridge access door.
Check the control panel to see if an error message displays.
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