Power Problems - Lenovo ThinkEdge SE455 V3 User Manual

• If the server starts, reseat the front operator panel.
• If the problem remains, replace the front operator panel.
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, 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, 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 (system board assembly).
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, call service to review the issue symptom and see
whether the system board (system board assembly) replacement is necessary.

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 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 power supply AC source is stable within the supported range.
4. Swap the power supply to see if the issue follows the power supply, if it follows the power supply, then
replace the failing one.
5. Review the event log and see how the problem it is to follow the event log actions to resolved the
problems.
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Chapter 8 Problem determination 299