Lenovo D400 Desktop IdeaCentre User Manual
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Chapter 5. Symptom-to-FRU index
USB controller failed
1. Make sure that the correct drivers are
installed and they are at the latest level.
2. Remove and reinstall the driver. Before you
remove any drivers, make sure that none of
your USB devices are connected to the
home center.
3. Make sure the front USB port cable is
installed correctly.
LAN controller failed
1. Make sure that the correct drivers are
installed and they are at the latest level.
2. Make sure that the Ethernet cable is
installed correctly.
3. Check the network LED on the front panel of
the home center. The network LED indicates
whether there is a problem with the
connector or cable. See the User Guide for
information about the network LED.
4. Check the LAN activity LED on the rear
panel. See the User Guide for information
about the LAN activity LED.
Fan failed
1. Make sure the connector on the fan is not
damaged.
2. Make sure the fan connector on the hard
disk drive backplane is not damaged.
3. Make sure the fan is properly installed. See
4. Replace the fan.
Memory failed
1. Make sure the DIMM is installed correctly.
See “Replacing the memory module”.
2. Reseat the DIMM.
3. Replace the DIMM.
Boot device not found
1. Replace the following components one at a
time, in the order shown, restarting the
home center each time:
- Hard disk drive
- Cable from the hard disk drive backplane
to the system board
- Hard disk drive backplane
Operating
condition
Error code
Description/Action
Bit 0
Bit 1
Bit 2
Bit 3