©2018 NEC Display Solutions, Ltd.
Page
60
of
71
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
config.txt
file.
•
Confirm the software being used is correctly configured for the 3
rd
party remote.
•
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
file contains the following line:
enable_uart=1
If using the Compute Module 3, the following two lines are also necessary:
dtoverlay=uart1
core_freq=250
