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Fan locations based on Fan status shown in System Summary in the Lenovo BIOS Setup Utility - ThinkCentre M90z

A post fan error 0135 occurs during POST but the user is unsure which of the three fan locations the error code references.

Affected configurations

The above symptom may occur on the following systems:

  • ThinkCentre M90z

Additional Information or Cause:

Additional Information or Cause


To identify which FAN is failing, enter BIOS Setup Utility > System Summary, then check Fan 1/Fan 2/Fan 3 status (Operating, Not Operating). In case "Fan 3 Not Operating," physical location is in the Power Supply Unit.

See the picture below for fan designations, CPU Fan, System Fan, and Power Supply Fan. Refer to the System service parts listing or HMM for correct FRU number and FRU replacement information.

Fan designations

Please click here to see System service parts for ThinkCentre M90z

Please click here to see Hardware Maintenance Manual (HMM) for ThinkCentre M90z


If you are unable to find what you are looking for, please do try the following options:
1. Lenovo Assisted Search
2. Product usage and general troubleshooting tips
3. Lenovo Support Forum
4. Technical Support Call Centre

Country Availability
Alias ID : SF11-D0095
Document ID : HT037693
Legacy Document ID : SF11-D0095
Last Updated :
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