Troubleshooting A Serial I/O Device; Troubleshooting A Nic - Dell E28S Series Owner's Manual

7. Turn off all attached USB devices, and disconnect them from the system.
8. Restart the system.
9. If your keyboard is functioning, enter System Setup, verify that all USB ports are enabled on
10. Check if USB 3.0 is enabled in System Setup. If it is enabled, disable it and restart your
11. If the system is not accessible, reset the NVRAM_CLR jumper inside your system and
12. In the IDRAC Settings Utility, ensure that USB Management Port Mode is configured as
13. Reconnect and turn on each USB device one at a time.
14. If a USB device causes the same problem, turn off the device, replace the USB cable with a
After you finish
If all troubleshooting fails, see the Getting help section.

Troubleshooting a serial I/O device

Procedure
1. Turn off the system and any peripheral devices connected to the serial port.
2. Swap the serial interface cable with a known working cable, and turn on the system and the
3. Turn off the system and the serial device, and swap the serial device with a compatible
4. Turn on the system and the serial device.
After you finish
If the problem persists, see the Getting help section.

Troubleshooting a NIC

Procedure
1. Run the appropriate diagnostic test. For more information, see the Using system diagnostics
2. Restart the system and check for any system messages pertaining to the NIC controller.
3. Check the appropriate indicator on the NIC connector:
the Integrated Devices screen. If your keyboard is not functioning, use remote access to
enable or disable the USB options.
system.
restore the BIOS to the default settings. See the System board jumper setting section
Automatic or Standard OS Use.
known good cable, and turn on the device.
serial device.
If the problem is resolved, replace the interface cable with a known working cable.
device.
section for the available diagnostic tests.
If the link indicator does not glow, the cable connected might be disengaged.
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If the activity indicator does not glow, the network driver files might be damaged or
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missing.
Install or replace the drivers as necessary. For more information, see the NIC
documentation.
Try another known good network cable.
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Troubleshooting your system
Dell PowerEdge R430 Owner's Manual
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