NEC C751Q Setup Manual page 31

If other devices, such as "/dev/sdb", are listed it could indicate that another USB drive is
currently connected. Disconnect the drive and repeat this step.
8. Flash the OS image to the Compute Module.
Navigate to the folder where the image file was downloaded and unzipped.
For example, from a new terminal window:
cd Downloads
Perform a directory listing to confirm the name of the image file:
ls
Write the downloaded image to the Compute Module using:
sudo dd if=xxxxxxxx.img of=/dev/sda bs=4MiB
Where xxxxxxxx.img is the name of the image file to write.
Note: This step will take several minutes to complete and erases all data on the Compute
Module.
When it is finished, confirm the "records in" matches the "records out".
9. The Compute Module in the display can now be restarted in normal mode to boot the device
(Example screens for navigating through the OSD controls are in step 6 above):
a. On the NEC display select the COMPUTE MODULE video input.
b. Navigate to the COMPUTE MODULE menu on the OSD.
c. Navigate to the SERVICE MENU item on the COMPUTE MODULE menu.
d. If the USB BOOT MODE setting is still set to ENABLE change it to DISABLE.
e. Navigate to the POWER item on the COMPUTE MODULE menu.
f. Select POWER SUPPLY to OFF.
g. Wait for power to the Compute Module to be shutdown. If you navigate to the same
menu item it should now show POWER SUPPLY OFF.
h. Select POWER SUPPLY to ON.
i. The boot-up sequence for the Compute Module should be seen on the screen.
8. Check for any system and firmware updates. See section 9.1.7.
©2018 NEC Display Solutions, Ltd.
Page 31 of 71