Troubleshooting 3-27
Troubleshooting LAN Problems
System Build-Up Procedure
The System Build-up Procedure is intended to help isolate a solid failure to a FRU. Start with minimum
hardware and add FRUs according to chart below.
The System will display "Switch Off" on the front panel with the Key Switch set to stand-by, the Power
Supply and Power Monitor installed and working, with AC power supplied.
Minimum hardware required for the System Build-Up procedure:
• System Card
• Power Supply
• Power Monitor PCA
• Front Panel
Begin with minimum hardware and install assemblies indicated in Table 3-15. on page 3-28.
Table 3-14. LAN Troubleshooting Procedure
Symptom Cause Action
No communication
over the network
Bad cable or con-
nection
1. Check cable connections at all connection points.
2. Replace the cable between the Core I/O Card and the AUI or TP-
MAU.
3. Verify LAN port configuration in the system.
4. MPE/iX only; Check the LAN Option Switch for AUI or Thin-
LAN setting.
4. Call the Response Center.
Bad LAN compo-
nent
1. Run appropriate LAN diagnostic.
2. Replace indicated component.
3. Verify LAN port configuration in the system.
4. Call the Response Center.
Unknown problem Call the Response Center.
NOTE
Be sure to put the computer key switch in the STANDBY position and remove the power cord before
removing or installing computer components.
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