These are possible solutions. Try one or more of the following:
Raise the scanner unit.
Remove any objects blocking the path of the print cartridge carrier.
Make sure the cartridge carrier lids are closed.

Close the scanner unit.
Press
.
Make sure the printer is on.
Raise the scanner unit.
Remove both print cartridges.
Make sure the cartridge carrier lids are closed.
Close the scanner unit.
Press
to turn the printer off.
Disconnect the power cord from the wall outlet.
Plug the power cord back into the wall outlet.
Press
to turn the printer on.
Reinstall the print cartridges. For more information, see Installing print cartridges

Close the scanner unit.
Plug the power cord into the wall outlet.
Press
to turn the printer on.
Reinstall the print cartridges. For more information, see Installing print cartridges.