Fresh out of the box.
Remove the scanner hinge screw (x1).
Pop the scanner from its hinge. Be careful not to tear the ribbon cable under this hinge!
Lift the scanner to the vertical position. Put the scanner against a wall or other vertical surface while you perform the next steps.
Remove the top cover screw (x1).
Pop the top cover free on the left of the printer.
Remove the top cover.
Disconnect the scanner flex cable under the top cover.
Rotate the carriage maintenance gear towards the front until the head carriage is release from the capping station.
Gently move the carriage to the middle of the bed.
Unclip and remove the flex cable cover.
Remove the ink tank flex cable.
Using a flat blade, gently push in on the slots on either side to unclip the ink tank electronics card.
Remove the ink tank electronics card.
Inspect the ink electronics card for debris
Unscrew the three retaining screws for the printhead
Gently remove the printhead. Take note of the flex cable path.
Inspect the printhead for scratches, ink globs, or other debris