NEC MPI4E Raspberry Pi Compute Module Setup Guide

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Problem: 10/100 Mbps on the display’s LAN1 and LAN2 does not work

Solutions:

• Confirm that the onboard USB 2.0 controller has been enabled in host mode. See section 5.1

Enabling the onboard USB 2.0 controller on page 33.

• Do not use this LAN interface at the same time as the Gigabit LAN connector on the Interface

Board unless specific measures have been taken to prevent the OS from assigning both

interfaces with the same MAC and IP addresses.

• Confirm that the OSD setting NETWORK  NETWORK SECURITY  INTERFACE  COMPUTE

MODULE has been enabled.

Problem: Compute Module boots with a bootloader screen but then hangs.

Solution:

• Confirm that a valid OS image compatible with the Compute Module 4 has been written to the

Compute Module.

• Try a different application to program the Compute Module. Verify the image after writing.

Problem: Screen appears gray and blacks aren’t true black.

Solution:

• Most OS distros on the Compute Module are set to output the video range of 16 to 235

(otherwise known as “RGB limited”) by default.

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NEC MPI4E RaspberryPi 4 System on a Chip Solution