88 CMA24BT cpuModule
BDM-610000087 Rev A
Common Problems and Solutions
Table 56 lists some of the common problems you may encounter while using your CMA24BT cpuModule,
and suggests possible solutions.
If you are having problems with your cpuModule, review this table before contacting RTD Technical
Support.
Table 56 Troubleshooting
Problem
Additional Symptoms
Possible Cause(s)
cpuModule does not boot
(no video output)
LED is red
(in reset)
Input power is inadequate. Refer to Chapter 1,
. Verify input voltages are correct. If power is
supplied via
CN3
, check for cabling issues.
Malfunctioning peripheral card. Remove all peripheral cards from
the system.
LED is yellow
(in standby)
cpuModule is in “Soft Off” due to operating system shutdown. Press
power button to wake.
ATX power supply is not turning on. Check jumpers on power
supply. Verify PSON# signal.
LED is cyan
(bus stacking error)
See Chapter 3,
LED is green
(normal operation)
cpuModule may be booted, but video is not connected properly.
Attach a keyboard and verify the operation of the Num Lock and
Caps Lock LEDs. If they respond as expected, the cpuModule is
booted. Check the video cable connections.
Video output may have been disabled in the BIOS. Try loading
BIOS defaults per Chapter 4,
.
If a PCI device is installed, the slot selection switch/jumpers may
not be set correctly.
Peripheral card may be interfering with boot sequence. Remove all
peripheral cards from the system.
cpuModule reboots
unexpectedly
cpuModule is running
Windows
By default, Windows will automatically reboot when a Bug check
(Blue Screen) is triggered. Disable this feature in the Control Panel.
This will allow you to see the error and identify the root cause.
cpuModule is powered via
Auxiliary Power Connector
(
CN3
)
Power cabling issues. Verify all pins on
CN3
are reliably connected
with proper gauge wires.
Power supply noise or current limiting. Check power pins with an
oscilloscope and verify they remain in range.
Power supply may not respond quickly enough to changes in power
consumption. Switch to a different power supply (a PCI Express
power supply is recommended)
Peripheral card(s) installed
Peripheral card(s) may be overloading the power supply. Reduce the
system to just the cpuModule and power supply and see if the
problem re-appears. (Note that
CN3
is intended for powering the
cpuModule only.)
cpuModule does not boot
to USB device
USB device has a high power
draw (e.g. DVD or hard
drive)
Some USB devices are not fully compliant and draw too much
current. Consider switching to a self-powered USB device with its
own AC/DC power supply.
Date/time not saved when
system is off
No RTC battery
A battery must be attached to the Utility Port 2.0 connector (
CN5
) to
maintain date/time when main power is removed. For a list of
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