IBM ThinkCentre 2296 Hardware Maintenance Manual page 19

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Run the Diagnostic programs. If necessary, refer to Chapter 4, "IBM Enhanced
Diagnostics," on page 15.
v If you receive an error, replace the part that the diagnostic program calls out or
go to Chapter 7, "Symptom-to-FRU Index," on page 69.
v If the test stops and you cannot continue, replace the last device tested.
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Chapter 3. General Checkout