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How to determine if a communications problem is related to a BusLAC/E card - WKB5516

Article number: 5516


 Determine if a communications issue is software-related or hardware (BusLAC/E card)-related.


  • PCI/PCI-e slot based BusLAC/E computers only
  • All Millennium
  • Empower
  • Empower 2
  • Empower 3
  • Breeze


  1. Remove the computer cover so you can see the BusLAC/E card and all LED lights.
  2. Note the series of eight LED lights, numbered left to right, on the top of the board.
  3. When a system is settled and booted, all LEDs except #8 should be ON.
  4. If any other LED if off, the BusLAC/E card is bad and needs to be replaced.


If there is an extra working BusLAC/E card with same part number, another option to see if it is the card is to swap them. 

The suggested steps are as follows:

1. Reboot the system
2. Power down and unplug the system
3. Remove the existing busLAC/E; do not install the PCI busLAC/E at this time
4. Power up the system
5. Remove the existing busLAC/E driver using Control Panel/Device Manager
6. Run the PCI busLAC/E Driver Installation Utility
7. Power down and unplug the system
8. Install the PCI busLAC/E; secure the board in the PC before attaching external IEEE and serial cables
9. Boot up the computer
10. Verify that the PCI busLAC/E driver loaded without conflicts/Resolve any conflicts (WKB4389)
11. Verify that the PCI busLAC/E will boot

Note: The card installs into a PCI slot on the motherboard. The other end of the card extends out of the case of the pc about 1/2 an inch. That extension has the IEEE connector on it 


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