A & T Internationale Xserve, Service Source

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Xserve (Late 2006) Troubleshooting — General Information
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Unplug the AC power cord. 2.
Remove the battery for at least 20 seconds. 3.
Reinstall the battery and wait 5 seconds, then press the power button on the front panel to 4.
start up the Xserve.
You will need to re-set the system date and time to the current date and time since these 5.
parameters will be reset when the RTC is reset.
System Reset
The Xserve has a system reset switch on the logic board that may be used to restart the Xserve
while it is powered up. This switch can be used to determine if a Xserve that won’t consistently
boot from a cold start has power supply issues. Follow these steps to reset the system:
With the Xserve powered up, press the SYS_RST switch located on the logic board to the rear of
the FB-DIMM slots.
If the Xserve boots after you press the SYS_RST switch, try shutting the Xserve off and restarting
by pressing the front panel power button. If the Xserve restarts when you press the SYS_RST
switch but not from a cold start, the power supply may need to be replaced.
Power-On Self Test (POST) Error Indications
A power-on self test in the Xserve’s ROM automatically runs whenever the Xserve is started
up after being fully shut down (the test does not run if the Xserve is only restarted). If the test
detects a problem, the status LED located above the power button on the front of the Xserve will
flash in the following ways*:
One short flash followed by a longer off period
If the system does not have any valid memory to boot from due to (1) no FB-DIMMs detected, (2)
memory initialization failure or (3) a quick memory test failure, then the front panel status LED
will blink once repeatedly.
Three short flashes followed by a longer off period
If the quick memory test passes but the more exhaustive memory test later in the boot sequence
fails, then the front panel status LED will blink three times repeatedly, and the FB-DIMM LED will
illuminate red for the respective FB-DIMM.
Troubleshooting:
Try reseating the memory FB-DIMMs. Check memory installation instructions for proper •
installation order. Swap affected FB-DIMM with known good FB-DIMM.
*Note: The status LED lights up when the power button is depressed at startup. Do not count
this light as one of the diagnostic flashes.