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General checkout

This chapter presents the following information:

• "What to do first" on page 20

• "Power system checkout" on page 21

Before you go to the checkout, make sure to read the following important notes:

Important notes:

• Only certified trained personnel can service the computer.

• Before replacing any FRU, read the entire page on removing and

• When you replace FRUs, use new nylon-coated screws.

• Be extremely careful during such write operations as copying,

• Replace an FRU only with another FRU of the correct model. When

• An FRU should not be replaced just because of a single,

• Be careful not to replace a nondefective FRU.

replacing FRUs.

saving, or formatting. Drives in the computer that you are servicing

sequence might have been altered. If you select an incorrect drive, data

or programs might be overwritten.

you replace an FRU, make sure that the machine model and the FRU part

number are correct by referring to the FRU parts list.

unreproducible failure. Single failures can occur for a variety of reasons

that have nothing to do with a hardware defect, such as cosmic radiation,

electrostatic discharge, or software errors. Consider replacing an FRU

only when a problem recurs. If you suspect that an FRU is defective,

clear the error logs and run the test again. If the error does not recur, do

not replace the FRU.

General checkout