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DIMM unstable cause MPU can't be registered

Publication Date:  2014-09-11 Views:  614 Downloads:  0

Issue Description

description:  The indicator light of MPU was blinking all the time , and the MPU can not be registered when at the process of power on for CE12808.
And the status of MPU is : MPU can be powered on but registered failed.

Alarm Information

Alarm information like below.

Handling Process

1.  Switch the slot of registered and unregistered MPU, we found that the fault  MPU still could not be registered and normal one can be registered.  So that means the slot is OK.

2.  We can find information from the log that the problem appeared with SDR,  and we try to unplug and plug the DIMM and MPU registered  successfully.


Root Cause

1. The slot has problem.
2. DIMM is broken.
3. The MPU board is broken.


1.  when you prepare to insert a board, please take good care of it when take it out from the packet in case to avoid the discreteness loose.
2. Pay attention to the key information from the print log, that may lead us quickly troubleshooting.