3. Check the system status LED on the system board (system board assembly). See “Processor-board
LEDs” on page 307
.
4. Check if the power input status LED is off or the yellow LED is lit on the power supply unit.
5. Do the AC cycle to the system, that is, power off the power supply units and re-power them on.
6. Remove the CMOS battery for at least ten seconds, then, reinstall the CMOS battery.
7. Try to power on the system by IPMI command through XCC or by the power button.
8. Implement the minimum configuration (one processor, one DIMM and one PSU without any adapter or
any drive installed).
9. Reseat all power supply units and make sure that the power input status LED on the power supply unit is
lit.
10. Replace power supply units and check the power button function after installing each unit.
11. If the issue cannot be resolved by all attempts above, call service to review the issue symptoms and see
whether the system board (system board assembly) replacement is necessary.
Server does not power off
Complete the following steps until the problem is resolved:
1. Determine whether you are using an Advanced Configuration and Power Interface (ACPI) or a non-ACPI
operating system. If you are using a non-ACPI operating system, complete the following steps:
a. Press Ctrl+Alt+Delete.
b. Turn off the server by pressing the power button on the front operator panel and holding it down for 5
seconds.
c. Restart the server.
d. If the server fails POST and the power-control button does not work, disconnect the power cord for
20 seconds; then, reconnect the power cord and restart the server.
2. If the problem remains or if you are using an ACPI-aware operating system, suspect the system board
(system board assembly).
Power problems
Use this information to resolve issues related to power.
System error LED is on and event log "Power supply has lost input" is displayed
To resolve the problem, ensure that:
1. The power supply unit is properly connected to a power cord.
2. The power cord is connected to a properly grounded electrical outlet for the server.
3. Make sure that the AC source of the power supply unit is stable within the supported range.
4. Swap power supply units to see that the issue follows which power supply unit, if the issue follows one
power supply unit, then place the failing one.
5. Review the event logs and identify problem category, follow the event log actions and fix the problem.
Serial-device problems
Use this information to solve problems with serial ports or devices.
•
“Number of displayed serial ports is less than the number of installed serial ports” on page 331
• “Serial device does not work” on page 331
330
ThinkSystem SR630 V4 User Guide
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