Io4 Troubleshooting - Silicon Graphics POWER CHALLENGE User Manual

IO4 Troubleshooting

There are a number of troubleshooting steps you can use to identify if the
IO4 is the cause of system level faults. Always check for loose connections or
damaged cables when trouble with IO4 peripherals occurs.
Never plug the Ethernet connector in while the system is powered on. This
action may result in a current surge that blows a fuse on the I/O adapter or
IO4. Symptoms resulting from this problem include:
• Ethernet not working
• Keyboard and mouse not working
• Powered peripheral ports not working
This problem requires a visit from a trained field service engineer.
There is no mechanical connection available for the RS-422 connector on an
optional second or third IO4.
Ethernet and RS-232 connectors connected to additional optional IO4 boards
may need to be initialized to work properly after installation. See Chapter 2,
"Enabling Additional Serial Ports," for an example of how this is done.
Additional parallel printer ports on optional IO4s may also need to be
initialized before they will work properly. For information on this topic see
Chapter 2, "Parallel Printer Ports."
IO4 Troubleshooting
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