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  1. How to clean HP Photosmart c4780 ribbon cables, Outer Shell Disassembly: Schritt 1, Bild 1 von 2 How to clean HP Photosmart c4780 ribbon cables, Outer Shell Disassembly: Schritt 1, Bild 2 von 2
    • 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.

  2. How to clean HP Photosmart c4780 ribbon cables: Schritt 2, Bild 1 von 1
    • Carefully pull the frame away from the glass.

    • If it doesn't remove easily, use the iFixit Opening Tool again to pry stuck sections.

  3. How to clean HP Photosmart c4780 ribbon cables: Schritt 3, Bild 1 von 1
    • Use a T10 screwdriver to unscrew the two screws that fasten the frame to the printer hood.

  4. How to clean HP Photosmart c4780 ribbon cables: Schritt 4, Bild 1 von 2 How to clean HP Photosmart c4780 ribbon cables: Schritt 4, Bild 2 von 2
    • Put your finger behind the panel with the power button.

    • Then, pull the piece outwards.

  5. How to clean HP Photosmart c4780 ribbon cables: Schritt 5, Bild 1 von 2 How to clean HP Photosmart c4780 ribbon cables: Schritt 5, Bild 2 von 2
    • Unscrew the screw inside the power button panel space.

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

  6. How to clean HP Photosmart c4780 ribbon cables: Schritt 6, Bild 1 von 1
    • Pull the white circuit board outwards which is located under the small screen.

    • Unplug the small ribbon cable from the circuit board.

    • Be careful when you unplug the ribbon cable not to use too much force. Using too much force may damage or rip the cable.

    • Unplug the small ribbon cable from the circuit board. Be careful when you unplug the ribbon cable not to use too much force. Using too much force may damage or rip the cable.

  7. How to clean HP Photosmart c4780 ribbon cables: Schritt 8, Bild 1 von 2 How to clean HP Photosmart c4780 ribbon cables: Schritt 8, Bild 2 von 2
    • Pull the memory card reader's circuit board out.

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

    • You may need to use a finger nail or a plastic opening tool to detach the white wiring connector from the circuit board.

  8. How to clean HP Photosmart c4780 ribbon cables: Schritt 9, Bild 1 von 2 How to clean HP Photosmart c4780 ribbon cables: Schritt 9, Bild 2 von 2
    • Put your finger behind the small screen.

    • Then, pull it up.

    • Do not hesitate to use force to remove the TouchSmart panel.

    • Disconnect the ribbon cable from the small screen.

  9. How to clean HP Photosmart c4780 ribbon cables: Schritt 10, Bild 1 von 1
    • Pull the printer hood upward.

  10. How to clean HP Photosmart c4780 ribbon cables, How to clean HP Photosmart c4780 ribbon cables: Schritt 11, Bild 1 von 1
    • Ribbon Cables connect electronics to one another and flat in appearance and flexible.

    • There are many ribbon cables throughout the printer. After opening up the casing of the printer the ones that are easily accessible are the ones that need cleaning. They all require the basic process to clean.

  11. How to clean HP Photosmart c4780 ribbon cables: Schritt 12, Bild 1 von 1
    • 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.

  12. How to clean HP Photosmart c4780 ribbon cables: Schritt 13, Bild 1 von 1
    • 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.

Abschluss

To reassemble your device, follow these instructions in reverse order.

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