CHAPTER 6 SELF DIAGNOSIS
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E740
0001
At power-on, the LAN card has a fault.
0002
The MAC address has a fault.
0003
The LAN card cannot be read.
Main cause
The LAN card is faulty. The main controller PCB is faulty.
Action
1. Connector
Is the connection between the LAN card and the main controller PCB nor-
mal?
NO:
Correct the connection.
2. LAN card, Main controller PCB
Try replacing the LAN card. Is the problem corrected?
YES: End.
NO:
Replace the main controller PCB.
E741
0000
The PCI bus has a fault.
Main cause
The PCI bus has poor connection. The main controller PCB is faulty.
Action
Each PCI slot may be disabled in service mode to prevent the error:
BOARD>PCI1-OFF through PCI3-OFF.
1. Board
Is the connection between the relay board and the main controller PCB nor-
mal?
NO:
Correct the connection.
2. Relay board, Main Controller PCB
Try replacing the relay board. Is the problem corrected?
YES: End.
NO:
Replace the main controller PCB.