IBM IntelliStation R Pro Hardware Maintenance Manual page 146

Notes:
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2.
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Hardware Maintenance Manual: xSeries 330 Type 8674 and IntelliStation R Pro Type 6851
d) 1 Terminator Card
e) Memory Module (with a minimum of 128 MB DIMM)
4) Power-on system. If problem remains, suspect the following FRUs in the
order listed:
a) Power supply
b) System board
If problem goes away, replace removed items one at a time until failing
item is found (power-on and reconfigure system each time).
If the problem goes away when you remove an adapter from the system, and
replacing that adapter does not correct the problem, suspect the System Board.
If you suspect a networking problem and all the system tests pass, suspect a
network cabling problem external to the system.