Lenovo ThinkSystem ST50 V2 Maintenance Manual page 169

This error message will be displayed if one of the following malfunctions occurs:
1. Heat sink fan failure
2. Front fan failure (Aux fan failure)
The front fan is shown as Aux Fan in BIOS Setup Utility. To see the Aux Fan, go to Setup Utility, select
Main ➙ System Summary ➙ Aux Fan
3. Rear fan failure (System fan)
The rear fan is shown as System Fan in BIOS Setup Utility. To see the System Fan, go to Setup Utility,
select Main ➙ System Summary ➙ System Fan
0164 - Memory Size Change or memory module installed slot change
Memory size change or memory module installed slot change is detected.
When Configuration Change Detection is enabled, this error message will be displayed when the memory
size increased/decreased, or when a memory module was moved from one slot to another.
To clear this error from the list of POST events, go to Setup Utility and select Save Changes and Exit.
1762 - Storage Device Configuration Change Has Occurred
Storage configuration (SATA devices and M.2 device) has been changed.
When Configuration Change Detection is enabled, this error message will be displayed when there is any
configuration change related to SATA drives (including optical drive) and M.2 drive.
Notes:
1. Change the drive SATA connectors will cause this error.
2. The M.2 drive detected is limited to the M.2 drive connected to the system-board M.2 slots.
3. To clear this error from the list of POST events, go to Setup Utility and select Save Changes and Exit.
0162 - Setup data integrity check failure
This error message indicates the checksum of BIOS Setup data in NVRAM is bad.
To clear this error from the list of POST events, go to Setup Utility and select Save Changes and Exit.
0167 - No Processor Microcode Update Found
This error message indicates that there is no microcode update image exists for the current processor.
0175 - System Security - Security data corrupted
This error message indicates the stored security data is corrupted.
To clear this error from the list of POST events, go to Setup Utility and select Save Changes and Exit.
0176 - System Security - The system has been tampered with
The system has been tampered with.
When Chassis Intrusion Function is enabled, this error will be displayed when the cover is not properly
installed before the server is powered on.
To clear this error from the list of POST events, go to Setup Utility and select Save Changes and Exit.
0189 - System Security - Cannot read the Security EEPROM
The Security EEPROM cannot be accessed.
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Chapter 4 Problem determination
161