General Checkout - Lenovo G575 Hardware Maintenance Manual

Hardware maintenance manual

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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 replacing

FRUs.

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

• Be extremely careful during such write operations as copying, 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.

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

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

correct by referring to the FRU parts list.

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

• Be careful not to replace a nondefective FRU.

General checkout

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