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HP Color LaserJet Enterprise MFP M776 - Removal and replacement: Control panel (M776)

Learn how to remove and replace the control panel.

Mean time to repair: 7 minutes

Service level: CSR A

Before performing service

Turn the printer power off

  • Disconnect the power cable.

    Warning:

    To avoid damage to the printer, turn the printer off, wait 30 seconds, and then remove the power cord before attempting to service the printer.

Use the table below to identify the correct part number for your printer. To order the part, go to www.hp.com/buy/parts.

Part information

Part number

Part description

J7Z09-67928

Control panel (M776dn/M776z/M776zs)

Required tools

  • #2 Phillips screwdriver with a magnetic tip

After performing service

Turn the printer power on

  • Connect the power cable.

  • Use the power switch to turn the power on.

Post service test

Make sure that the printer initializes to a Ready state.

Print a page to make sure that the printer is functioning correctly.

Remove the control panel (M776)

Follow these steps to remove the control panel (M776).

  1. Rotate the control panel to the fully raised position (callout 1), and then raise the document feeder (callout 2).

    Raise the control panel and document feeder

    Raise the control panel and document feeder
  2. Beginning at the right side of the control-panel cover, carefully release five tabs along the top edge of the cover.

    Note:

    The thin black-plastic cover will separate from the white-plastic control-panel base.

    Release the control panel cover

    Release the control panel cover
  3. Rotate the control panel cover slightly forward (callout 1), and then lift up to remove the cover (callout 2).

    Remove the control panel cover

    Remove the control panel cover
  4. M776z or M776zs only: Open the connector latch to release the keyboard flat cable.

    Release the keyboard flat cable (M776z/M776zs)

    Release the keyboard flat cable
  5. Disconnect two connectors

    Disconnect two connectors

    Disconnect two connectors
  6. Remove the USB cable (callout 1) from the holder, and then release the cable from two retainers (callout 2).

    Release the USB cable

    Release the USB cable
  7. Remove three screws (callout 1).

    Remove three screws

    Remove three screws
  8. Lift the front of the control panel off of the printer (callout 1), and then slide it towards the front of the printer (callout 2) to remove it.

    Remove the control panel

    Remove the control panel

Unpack the replacement assembly

Follow these steps to unpack the replacement assembly.

  1. Dispose of the defective part.

    Note:

    HP recommends responsible disposal of the defective part.

    http://www8.hp.com/us/en/hp-information/environment/product-recycling.html

  2. Unpack the replacement part from the packaging.

    CAUTION:

    Some parts are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation or mat. If an ESD workstation or mat is not available, touch the sheet-metal chassis to provide a static ground before touching an ESD-sensitive assembly. Protect the ESD-sensitive assemblies by placing them in ESD pouches when they are out of the printer.

    Important:

    Make sure that all of the shipping materials (for example shipping tape) are removed from the replacement part prior to installation.

    Note:

    If the replacement part is a roller or pad, avoid touching the spongy part of it. Skin oils on the roller or pad can cause paper pickup and/or print-quality problems. HP recommends using disposable gloves when handling rollers or pads or washing your hands before touching rollers or pads.

  3. To install an assembly, reverse the removal steps.

    Note:

    When applicable, special installation instructions are provided for an assembly at the end of the removal procedure. Always completely read the removal instructions and follow all special installation instructions.

Install the control panel (M776)

Follow these steps to install the control panel (M776).

  1. Raise the display on the replacement control panel.

    Raise the control panel display

    Raise the control panel display
  2. M776z or M776zs only: When installing the control panel, make sure that the keyboard flat cable (callout 1) passes through the opening (callout 2) in the control panel base.

    Check the keyboard flat cable (M776z/M776zs)

    Check the keyboard flat cable
  3. Locate the four hooks on the printer and matching slots in the control-panel base (callout 1). The hooks fit into the slots (callout 2) when the assembly is installed.

    Note:

    Make sure that the grounding clip (callout 3) is on top of the assembly base when it is installed.

    Locate the hooks and slots

    Locate the hooks and slots
  4. Position the rear edge of the control panel in the printer (callout 1), and then lower the front edge down (callout 2) to install it.

    Note:

    If the control panel is difficult to install, make sure that the hooks, slots, and grounding clip are correctly engaged. See the previous step.

    Install the control panel

    Install the control panel
  5. Install three screws (callout 1), making sure that the grounding clip (callout 2) is correctly installed.

    Install three screws

    Install three screws
  6. Connect two connectors

    Connect two connectors

    Connect two connectors
  7. Position the USB cable in the holder, and then install the cable into two retainers.

    Install the USB cable

    Install the USB cable
  8. M776z or M776zs only: Position the keyboard flat cable in the connector, and then close the connector latch..

    Important:

    Slightly tug on the cable to make sure that it is fully captured in the connector.

    Note:

    When the connector latch is closed and the cable is correctly installed, the white line on the cable is parallel to the connector latch.

    Install the keyboard flat cable (M776z/M776zs)

    Install the keyboard flat cable
  9. Position the control panel cover over the control panel (callout 1), and then tilt the back of the cover down (callout 2).

    Position the control panel cover

    Position the control panel cover
  10. Beginning at the left side of the control-panel cover, carefully push down along the top edge of the cover to engage five tabs.

    Install the control panel cover

    Install the control panel cover
  11. Lower the document feeder (callout 1) and the control panel (callout 2).

    Close the document feeder

    Close the document feeder

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