2. Make sure that:
• The power cords are correctly connected to the server and to a working electrical outlet.
• The LEDs on the power supply do not indicate a problem.
• The Power button LED is lit on and flash slowly.
• The push force is enough and with button force response.
3. If the power button LED didn't lit on or flash correctly, Please reseat all the power supplies and make
sure AC LED on PSU rear side are lit on.
4. If you have just installed an optional device, remove it, and restart the server.
5. If the issue is still observed or without power button LED lit on, implement the minimum configuration to
check whether any specific components lock the power permission. Replace the each power supply and
check the power button function after installing the each one.
6. If everything is still done and the issue cannot be resolved, please collect the failure information with
system logs captured to Lenovo support.
Server does not power on
Complete the following steps until the problem is resolved:
1. Check the event log for any events related to the server not powering on.
2. Check for any LEDs that are flashing amber.
3. Check the power LED on the system board.
4. Check if AC power LED is lit on or the amber LED is lit on at the PSU rear side.
5. AC cycle the system.
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 and
any drive installed).
9. Reseat all power supplies and make sure that AC LEDs on the PSU rear side are lit.
10. Replace the each power supply and check the power button function after installing the each one.
11. If the issue cannot be resolved by above actions, please call service to review the issue symptom and
see whether the system board replacement is necessary.
Memory problems
Use this information to resolve issues related to memory.
• Displayed system memory is less than installed physical memory
• Multiple rows of DIMMs in a branch identified as failing
• DIMM PFA issue
Displayed system memory is less than installed physical memory
Complete the following steps until the problem is resolved.
Note: Each time you install or remove a DIMM, you must disconnect the server from the power source; then,
wait 10 seconds before restarting the server.
1. Make sure that:
• Memory modules from different vendors are not in the same channel.
• No error LEDs are lit on the operator information panel.
Chapter 5. Problem determination 247
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