6.Push the ink cartridge clamps toward the back of the printer until they lock in place.
Caution:
c Once you install the ink cartridges, do not open the clamps or remove them except to replace them with new ones. Otherwise, cartridges may become unusable.
7.Press the Alt button again to return the print head to its home position. (Even if you do not press Alt, the printer moves the print head back to its home position about 60 seconds after you install the cartridges.)