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Glad this was documented on Lenovo’s site for the A70z (all-in-one) system.
They have other systems also and you can find them here: http://support.lenovo.com/en_US/SupportSearchResults.page?searchText=fan+locations+based+on+POST+error+code
It specifies to review the “HMM” (Hardware Maintenance Manual) for the FRU to re-order. The HMM can be found: http://support.lenovo.com/en_US/guides-and-manuals/detail.page?LegacyDocID=TCTR-HMM
Fan locations based on POST error codes – ThinkCentre A70z
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A fan error occurs during POST but the user is unsure which of the three fan locations the error code references.
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The above symptom may occur on the following systems:
Additional Information:
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Error Message
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Fan # in BIOS
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Physical Location
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| 0135: CPU Fan fail |
Fan 1 |
Fan closest to CPU |
| 0135: System Fan 1 fail |
Fan 2 |
Fan closest to HDD |
| 0135: System Fan 2 fail |
Fan 3 |
Fan attached to planar cover |
See the picture below for fan designations, System Board Fan – Fan2, CPUFan1, and SYSFAN1.
Refer to the HMM for correct FRU number and FRU replacement information.

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About Rich Kreider
Hello, world!
I'm over 1/4 of a century old. I'm just another tech guy swinging from vine to vine in the jungle of technology and life. I currently work for an IT consulting firm in northwestern Pennsylvania and before that I was a system administrator for a small ISP that was centrally located in Ohio's Amish area.
The answer is 42.