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Asset ID: 1-72-1924051.1
Update Date:2017-12-14
Keywords:
Solution Type  Problem Resolution Sure

Solution  1924051.1 :   Host power-on denied because /SYS/MB missing or faulted  

Related Items 
    

  • Netra SPARC T4-1 Server
    •  
  • Netra SPARC T4-1 Server
    •  
Related Categories 
    

  • PLA-Support>Sun Systems>SPARC>CMT>SN-SPARC: T4
    •  




Using incorrect mounting screws to secure each of the hardmount brackets to the sides of the server can cause damage to internal components.

In this Document
Symptoms
Changes
Cause
Solution
References

Created from <SR 3-9461308821>

Applies to:

Netra SPARC T4-1 Server - Version All Versions to All Versions [Release All Releases]
Netra SPARC T4-1 Server
Information in this document applies to any platform.

Symptoms

Symptoms reported looks like to the ones described in section F) /SYS/MB/V_+3V3_SLOT of below document, but it is different:

POK power glitches & regulator faults cause T3-x/T4-x/NetraT3-1/NetraT4-x/T3-1B/T4-1B/NetraT3-1B/Netra T4-1B to power down unexpectedly (Doc ID 1443866.1)

Platform will not stay powered on and powers off after a few seconds. Sample outputs of:

##### fma/@persist@faultdiags@ereports.log

2014-08-07/08:26:27  ereport.chassis.voltage-lnc-glo@/sys/mb  /SYS/MB/V_+3V3_SLOT
2014-08-07/08:26:32  ereport.chassis.voltage-lcr-glo@/sys/mb  /SYS/MB/V_+3V3_SLOT
...
2014-08-11/11:35:22  ereport.chassis.voltage-lnc-glo@/sys/mb  /SYS/MB/V_+3V3_SLOT
2014-08-11/11:35:27  ereport.chassis.voltage-lcr-glo@/sys/mb  /SYS/MB/V_+3V3_SLOT

 

-> show -script /X/logs/event/list (/SP/logs/event/list)

134 Thu Aug 7 09:11:00 2014 Chassis Log    critical  Host power-on denied because /SYS/MB missing or faulted
133 Thu Aug 7 09:10:59 2014 System  Log    minor     power button has been pressed
132 Thu Aug 7 09:10:59 2014 System  Log    minor     System power on has been requested via power button.
131 Thu Aug 7 08:26:33 2014 Chassis Action minor     Inventory has been updated starting at node '/SYS/MB'
130 Thu Aug 7 08:26:32 2014 Fault   Fault  critical  Fault detected at time = Thu Aug 7 08:26:32 2014. The suspect component:
                                                     /SYS/MB has fault.chassis.voltage.fail with Refer to http://www.sun.com/msg/SPT-8000-DH for details.
129 Thu Aug 7 08:26:32 2014 System  Log    minor     Host: Powered Off
128 Thu Aug 7 08:26:32 2014 Power   Off    major     Power to /SYS has been turned off by: SP, Reason: Fault
127 Thu Aug 7 08:26:32 2014 Sensor  Log    major     Voltage : /SYS/MB/V_+3V3_SLOT : Lower Critical going low : reading 0   threshold 3.08 Volts
126 Thu Aug 7 08:26:27 2014 Sensor  Log    minor     Voltage : /SYS/MB/V_+3V3_SLOT : Lower Non-critical going low : reading 0

125 Thu Aug 7 08:26:16 2014 System  Log    minor     Host: Powered On

 

-> show faulty
Target                      | Property               | Value
----------------------------+------------------------+---------------------------------
/SP/faultmgmt/0             | fru                    | /SYS/MB
/SP/faultmgmt/0/faults/0    | class                  | fault.chassis.voltage.fail
/SP/faultmgmt/0/faults/0    | sunw-msg-id            | SPT-8000-DH
/SP/faultmgmt/0/faults/0    | component              | /SYS/MB
/SP/faultmgmt/0/faults/0    | uuid                   | bf1b6d44-7f80-e91b-ef17-f86022e00077
/SP/faultmgmt/0/faults/0    | timestamp              | 2014-08-11/11:57:29
/SP/faultmgmt/0/faults/0    | detector               | /SYS/MB/V_+3V3_SLOT
/SP/faultmgmt/0/faults/0    | fru_part_number        | 7051608
/SP/faultmgmt/0/faults/0    | fru_serial_number      | 465769T+1348L80E7Y
/SP/faultmgmt/0/faults/0    | product_serial_number  | AK00178933
/SP/faultmgmt/0/faults/0    | chassis_serial_number  | AK00178933

 

Changes

The server just moved from another location and was recently   installed in a rack.

Cause

Problem caused by incorrect rack mounting screws

screws

The use of inappropriate screws to secure side brackets damage the motherboard and cause short circuit, also internal disks may be damaged.

screw_mb

SPARC T3-1 & SPARC T4-1 are not affected. No screws used for rack mounting.

Solution

1) Use four of the supplied M5 x 4.5-mm flathead Phillips screws to secure each of  the hardmount brackets to the sides of the server.

    See page 28  of "Netra SPARC T4-1 Server Installation Guide"

2) Replace the motherboard

3) Replace hard disk drive if necessary

 

References

<NOTE:1159623.1> - SPT-8000-DH - Voltage fail

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