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Symptom
System hangs during
motherboard BIOS
control of startup.
T
ROUBLESHOOTING
Possible cause
Startup (continued)
One of the following:
• Missing, unmatched, incorrect,
or faulty DIMMs
• Faulty or overheated CPU(s)
Suggested action
1. Check all cables and connections again and reboot.
2. Check the DIMMs and reseat them to remove any
oxidation on the connectors (see
that the DIMM configurations in both socket sets are
identical (see
page
100).
3. If the problem persists, test the DIMMs by removing
all DIMMs except for the one installed in J11, and
reboot the system.
If the system boots to Idle, install a different DIMM in
J11 and reboot the system. Continue to install a
different DIMM in the socket and reboot the system
until the system fails to reach Idle. The last DIMM that
you installed may be faulty and should be replaced.
N
:
If the system fails to reach Idle with each DIMM
OTE
installed in J11, the DIMM socket may be faulty and you
may need to replace the motherboard.
4. If the problem persists, verify the CPU and CPU
fan connections, and verify that the CPU heatsinks are
securely installed (see
page
Test the CPUs by removing the CPU installed in socket
CPU1 and rebooting.
– If the system fails to boot up properly, the CPU in socket
CPU0 is faulty and should be replaced.
– If the system boots up properly, the CPU in socket CPU0
is good and the CPU that you removed from socket
CPU1 may be faulty. To test this, remove the CPU from
socket CPU0, install the other CPU in socket CPU0, and
reboot. If the system fails to boot up properly, the CPU
currently installed in socket CPU0 is faulty and should
be replaced.
152
page
99). Make sure
102).
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