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All LPU of Quidway NetEngine80E cannot Power On Because Memory Bar of MPU Plugs in False Slot

Publication Date:  2012-07-27  |   Views:  176  |   Downloads:  0  |   Author:  Lin Changjian  |   Document ID:  EKB0000173589

Contents
Issue Description Alarm Information Handling Process Root Cause Suggestions

Issue Description

Both fan and LCD screen of NE80E run well after power-on, but all LPUs cannot power on. The LED for run and active do not have indication. The device cannot start. 

Alarm Information

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Handling Process

1. Take out all the service boards and leave one MPU only; power it on, but it fails. 
2. Take out the MPU, and plug the memory bar into the first slot; power it on again, and it is normal then. 
Note: The first slot at MPU is marked as J10, and the second as J11.

Root Cause

1. LPU cannot power on because of the problem on backplane. 
2. The LPU hardware is responsible for it. In the case, the MPU has two slots for memory bars. If there is only one memory bar, plug it into the first slot of MPU, and the MPU can power on; at this point, the other service baords can power on and run well. 

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