The SRUA main control board of NE40E-4 cannot been registered

【 ProblemSu mm ary 】 The SRUA main control board of NE40E-4 cannot been registered【 ProblemDetails 】

<NE40E> displaydevice

NE40E \' sDevicestatus.

Slots The   Type             Online       Register           Status           Primary

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

1                 LPU               Present     Registered       Normal           NA

2                 LPU               Present     Registered       Normal           NA

9                 MPU               Present     Unregistered Abnormal       Slave

10               MPU               Present     NA                       Normal           Master

11               SFU               Present     Registered       Normal           NA

12               SFU               Present     Registered       Normal           NA

13               SFU               Present     Registered       Normal           NA

14               SFU               Present     Registered       Normal           NA

16               CLK               Present     Registered       Normal           Master

17               PWR               Present     Registered       Normal           NA

18               PWR               Present     Registered       Normal           NA

19               FAN               Present     Registered       Normal           NA

After we collecting debugging information through the serial port, we can find the Lanswitch malfunction as follows:

The battery testing..............................pass!

The bridge DMA testing...........................pass!

The nvram data bus testing.......................pass!

The nvram address bus testing....................pass!

The nvram unit testing...........................pass!

The eeprom simple testing........................pass!

The TBC memory testing...........................pass!

The TBC loopback testing.........................pass!

The Lanswitch chip BIST testing..................pass.

The Lanswitch chip switch table testing..........pass.

The Lanswitch chip packet buffer testing.........pass.

The Ethernet port MAC internal loopback test fail.

The Lanswitch chip MAC internal loopback testing. Fail.

The Ethernet port 6 MAC internal loopback test fail.

Replace the faulty main control board.