How to clean HP Photosmart c4780 ribbon cables

Unplug the device from any energy sources.

Lift the top cover of the scanner.

Use a plastic opening tool to remove the plastic frame surrounding the glass.

Carefully pull the frame away from the glass.

Use a T10 screwdriver to unscrew the two screws that fasten the frame to the printer hood.

Put your finger behind the panel with the power button.

Then, pull the piece outwards.

Unscrew the screw inside the power button panel space.

Then, unscrew the screw that is across the printer slider.

Pull the white circuit board outwards which is located under the small screen.

Unplug the small ribbon cable from the circuit board.

Pull the memory card reader's circuit board out.

Detach the white wiring connector from the back of the circuit board.

Put your finger behind the small screen.

Then, pull it up.

Disconnect the ribbon cable from the small screen.

Pull the printer hood upward.

Ribbon Cables connect electronics to one another and flat in appearance and flexible.

In order to remove a ribbon cable pull the cable out of its port with a moderate amount of force. Remember the orientation of the cable if you can.

After the cable is removed use compressed air to clear dust out of the port, and a dry soft cloth to clean the end of the cable.