T5120, T5220, T5140, T5240: Server powered itself off and refuses to power on due to "Chassis cover removed."

Asset ID:	1-72-2094200.1
Update Date:	2018-03-06
Keywords:

Solution Type Problem Resolution Sure

Solution 2094200.1 : T5120, T5220, T5140, T5240: Server powered itself off and refuses to power on due to "Chassis cover removed."

Applies to:

Sun SPARC Enterprise T5220 Server - Version Not Applicable and later
Sun SPARC Enterprise T5240 Server - Version Not Applicable and later
Sun SPARC Enterprise T5120 Server - Version Not Applicable and later
Sun SPARC Enterprise T5140 Server - Version Not Applicable and later
Information in this document applies to any platform.

Symptoms

Server refuses to power on and the SP event log shows several "Chassis cover removed." events but the server's chassis cover had not been touched.

Changes

There were no chances and also no maintenance work taking place.
The server suddenly powered itself off.

Cause

The SP noted that the chassis cover was removed and therefore powered off the server.

This could be caused by either:

- The top cover of the chassis does not sit correctly
- There is a problem with the intrusion|interlock switch or its counterpart, the magnet
- An issue with the cable connection between intrusion|interlock switch and Power Distribution Board.

-> show faulty
   Target                   | Property               | Value
   -------------------------+------------------------+---------------------------------
   /SP/faultmgmt/0          | fru                    | /SYS/MB
   /SP/faultmgmt/0/faults/0 | timestamp              | Dec 08 00:09:31
   /SP/faultmgmt/0/faults/0 | sp_detected_fault      | Chassis cover removed.

-> show /SP/logs/event/list
   ID    Date/Time                Class    Type     Severity
   ----- ------------------------ -------- -------- --------
   1086  Tue Dec 8 00:09:31 2015  Fault    Fault    critical  SP detected fault at time Tue Dec 8 00:09:31 2015. Chassis cover removed.
   1085  Tue Dec 8 00:09:31 2015  Chassis  Log      major     System poweron is disabled
   1084  Tue Nov 24 21:49:59 2015 Chassis  Log      major     System poweron is enabled
   1083  Tue Nov 24 21:49:59 2015 Fault    Repair   minor     SP detected fault cleared at time Tue Nov 24 21:49:55 2015. Chassis cover removed.
   1082  Tue Nov 24 21:49:55 2015 Fault    Fault    critical  SP detected fault at time Tue Nov 24 21:49:55 2015. Chassis cover removed.
   1081  Tue Nov 24 21:49:55 2015 Chassis  Log      major     System poweron is disabled
   1080  Tue Nov 24 21:49:55 2015 Chassis  Log      critical  Host has been powered off

Solution

This could be caused by either:

Note: If you need to replace the cable between the intrusion switch and the PDB: This cable (Intrusion|Interlock Switch Cable) comes with the "Connector Board Assembly (CONNBD)"

Before trying to power on, please first clear the fault status using "clearasrdb" (ALOM) or "set /SYS/MB clear_fault_action=true" (ILOM).

If the three above steps did not help to find the root cause, please open a Service Request with Oracle Support.

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