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This document provides the procedures to remove and replace the control panel (556).
Mean time to repair: 10 minutes
Service level: Basic
Turn the printer power off
Disconnect the power cable.
To avoid damage to the printer, turn the printer off, wait 30 seconds, and then remove the power cable 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.
Control panel (M556) part number
Control panel (M556) with instruction guide
A reversible-shaft screwdriver is supplied with this kit.
Torx driver (#10 with magnetized tip).
Small flat-blade screwdriver.
Turn the printer power on
Connect the power cable.
Use the power switch to turn the power on.
Make sure that the printer initializes to a Ready state.
Access the menus by using the printer control panel, and then print a configuration page to make sure that the printer is functioning correctly.
Verify that the control panel is correctly functioning. See the control panel check section in the printer troubleshooting manual.
Follow these steps to remove the control panel (556).
This step is for the 556 only. For the 586, skip this step.
Tilt the control panel to the fully raised position.
Tilt the control panel up
Insert a small flat-blade screwdriver into the notch in the cover, and then carefully pry up the cover to release it. Remove the cover.
Release two tabs
Remove two # 10 torx screws (callout 1).
Store the screws in a secure place where they cannot fall down into the printer.
Remove two screws
Lift up the rear edge of the control panel (callout 1), and then slightly slide it toward the rear of the printer (callout 2) to release the front tabs.
Release the control panel over
Turn the control panel over (callout 1), to gain access to the bottom side.
Turn the control panel over
Disconnect one HDMI cable (callout 1) and one connector (callout 2), and then remove the control panel.
Disconnect connectors and remove the control panel
Follow these steps to unpack the replacement assembly.
Dispose of the defective part.
HP recommends responsible disposal of the defective part.
Unpack the replacement part from the packaging.
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.
Make sure that all of the shipping materials (for example shipping tape) are removed from the replacement part prior to installation.
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.
To install an assembly, reverse the removal steps.
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.
Follow these steps to install the control panel (556).
Connect one HDMI cable (callout 1) and one connector (callout 2).
Install the tabs (callout 1) on the front of the control panel in the slots (callout 2) on the printer top cover.
Install the control panel
With the front tabs engaged in the slots (callout 1), rotate the control-panel base down onto the printer (callout 2).
Rotate the control-panel base down
Install two # 10 torx screws (callout 1).
Install two screws
Position the access cover mounting feet into the slots in the top cover (callout 1), and then rotate the cover down (callout 2) to install it.
Press down on the cover firmly to make sure that the tabs (callout 3) snap into place.
Install the cover