Troubleshooting A Serial I/O Device; Troubleshooting A Nic - Dell PowerEdge R810 Owner's Manual

for instructions on setting the NVRAM_CLR jumper inside your system
and restoring the BIOS to the default settings.
4 Reconnect and power on each USB device one at a time.
5 If a device causes the same problem, power down the device, replace the
USB cable, and power up the device.
If the problem persists, replace the device.
If all troubleshooting fails, see "Getting Help" on page 195.

Troubleshooting a Serial I/O Device

1 Turn off the system and any peripheral devices connected to the serial
port.
2 Swap the serial interface cable with a working cable, and turn on the
system and the serial device.
If the problem is resolved, replace the interface cable.
3 Turn off the system and the serial device, and swap the device with a
comparable device.
4 Turn on the system and the serial device.
If the problem is resolved, replace the serial device.
If the problem persists, see "Getting Help" on page 195.

Troubleshooting a NIC

1 Run the appropriate online diagnostic test. See "Using Online Diagnostics"
on page 181.
2 Restart the system and check for any system messages pertaining to the
NIC controller.
3 Check the appropriate indicator on the NIC connector. See "NIC Indicator
Codes" on page 20.
• If the link indicator does not light, check all cable connections.
• If the activity indicator does not light, the network driver files might
be damaged or missing.
Troubleshooting Your System
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