Diagnostics 17
In addition, ensure that the environmental specifications for
the system are met. See “Featur e s an d spec if ic ation s” on
page 3.

Diagnosing errors

To find solutions to problems that have definite symptoms,
see “Error symptoms” on page 138.
If you cannot find the problem there, go to “Starting the diag-
nostic programs” on page 1 1 to test the server.
If yo u ha ve j ust ad de d ne w sof twa re or a ne w opt ion an d t he
server is not working, do the following before using the error
sym ptoms table:
• Remove the software or device that you just added.
• Run th e diagnostic tests to determine if the serve r is
ru nn in g corr e ctl y.
• Reinstall the new software or new device.

Troubleshooting the Ethernet controller

This section provides troubleshooting information for prob-
lems that m ight occur w ith the 10/100 Mbps Ethernet con-
troller.

Network connection problems

If the Et hernet contro ller cannot connect to the network,
check the following:
• Make su re that the cable is i nstalled corr ectly.
The network cable must be securely attached at all
connections. If the cable is attach ed but the pr oblem
persists, try a different cable.
If you set the Ethernet controller to operate at 100
Mbps, you must use Category 5 cabling.
If y ou di r ectl y con ne ct tw o wor ks tat io ns (w itho ut a hu b),
or if you ar e not usin g a hub with X ports, use a cross-
ov er cable.
Note: To determine w hether a hub has an X port,
check the port label . If the label contains an
X
,
t he hub ha s an X por t.
• Determine if the hub supports auto-negotiation. If not,
try configuring the integrated Ethernet controller manu-
ally to m atch the speed and duplex mode of the hub.
• Check the Ethernet controller lights on the operator
information panel.
These l ights indicate whether a problem exists with th e
connector, ca ble, or hub.
— The Ethernet Link Status light illuminates when
the E t he rne t co ntr o ll er r ec eiv es a LIN K pu ls e f rom
the hub. If the light is off, there might be a defec-
tive connector or cable, or a p roblem with the hub.
— The Ethernet Transmit/Receive Activity light illumi-
nates when the Ethernet controller sends or
receives data over the Ethernet Network. If the
Ethernet T ransmit/Receive Activity light is off,