HP 310X - Manual (Page 160)

Is one of the link lights ON (solid
green)?
for HP Jetdirect 175x external print server/Internet connector for USB
and HP Jetdirect 310x external print server/Internet connector for
USB
10 light 100 light
Check the link lights on your print server; these lights are built into
the network connector. One of the link lights -- either the 10 light or
the 100 light, but not both -- should be ON solid green, to indicate a
valid network connection.
Is either the 10 light or the 100 light ON solid green?
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