Lenovo IdeaPad U300s Bedienungsanleitung PDF herunterladen (Seite 23)

General checkout

This chapter presents the following information:

• “What to do rst” 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certied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.

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Lenovo IdeaPad U300s Bedienungsanleitung Seite 23