NEC C751Q Setup Manual page 60

Problem: "RPi Boot" is unable to detect the Compute Module
Solutions:
If the display is currently in a power save mode (LED is flashing green), press the POWER ON
•
button on the IR Remote control.
On the COMPUTE MODULE menu of the OSD, confirm that POWER SUPPLY is set to ON.
•
On the COMPUTE MODULE menu of the OSD, confirm that USB BOOT MODE is set to ENABLE.
•
Note: The Compute Module power will have to be cycled off and on after changing the boot
mode to ENABLE.
Check that the Compute Module is correctly seated and latched in the SO-DIMM socket on the
•
Interface board.
• Check that a USB cable is connected from the USB2 connector on the display to the host PC.
• Do not use a USB extender cable or hub between the host PC and the display. The host PC must
be directly connected to the display via a single USB cable.
"RPi Boot" may have already been run while the Compute Module has been powered up in boot
•
mode. Running it again will not find the Compute Module.
• Disconnect and reconnect the USB cable to the host PC.
Problem: 3 rd party IR Remote is not functioning
Solutions:
Confirm the OSD COMPUTE MODULE setting for IR SIGNAL is set to ENABLE
•
• Confirm lirc is enabled in the
• Confirm the software being used is correctly configured for the 3
Use lirc debugging mode to view the raw IR sensor output.
•
• CEC support may be enabled. Normally CEC support must be disabled in order for lirc to work
correctly.
Problem: Serial communications with the display not functioning
Solutions:
Confirm the OSD COMPUTE MODULE setting for MONITOR CONTROL is set to ENABLE
•
• Confirm the
config.txt
enable_uart=1
If using the Compute Module 3, the following two lines are also necessary:
dtoverlay=uart1
core_freq=250
©2018 NEC Display Solutions, Ltd.
file.
config.txt
file contains the following line:
rd party remote.
Page 60 of 71