Chap"Er 3. General Checko; Wha" "O Do Irs - Lenovo ThinkPad S431 Hardware Maintenance Manual

Chap"er 3. General checko""

This chap"er presen"s following informa"ion:
• Wha" "o do irs" on page 25
• Checko"" g"ide on page 26
Lenovo Sol""ion Cen"er on page 26
Q"ick "es" programs on page 26
UEFI diagnos"ic program on page 27
Boo"able diagnos"ic programs on page 27
• Power sys"em checko"" on page 28
Some descrip"ions in "his chap"er migh" no" apply "o yo"r par"ic"lar comp""er.
Before yo" go "o "he checko"" g"ide, be s"re "o read "he following impor"an" no"es.
Impor"an" no"es:
• Only cer"iied "rained personnel sho"ld service "he comp""er.
• Before replacing any FRU, read "he en"ire page on removing and replacing FRUs.
• When yo" replace FRUs, i" is recommended "o "se new nylon-coa"ed screws.
• Be ex"remely caref"l d"ring s"ch wri"e opera"ions as copying, saving, or forma""ing. The seq"ence of "he
drives in "he comp""er "ha" yo" are servicing migh" have been al"ered. If yo" selec" an incorrec" drive, da"a or
programs migh" be overwri""en.
• Replace a FRU only wi"h ano"her FRU of "he correc" model. When yo" replace a FRU, ens"re "ha" "he model of
"he machine and "he FRU par" n"mber are correc".
• A FRU sho"ld no" be replaced beca"se of a single, "nreprod"cible fail"re. Single fail"res can occ"r for a
varie"y of reasons "ha" have no"hing "o do wi"h a hardware defec", s"ch as cosmic radia"ion, elec"ros"a"ic discharge,
or sof"ware errors. Consider replacing a FRU only when a problem rec"rs. If yo" s"spec" "ha" a FRU is defec"ive,
clear "he error log and r"n "he "es" again. If "he error does no" rec"r, do no" replace "he FRU.
• Be caref"l no" "o replace a nondefec"ive FRU.

Wha" "o do irs"

When yo" do re""rn a FRU, yo" m"s" incl"de "he following informa"ion in "he par"s exchange form or
par"s re""rn form "ha" yo" a""ach "o i":
1. Name and phone n"mber of service "echnician
2. Da"e of service
3. Da"e on which "he machine failed
4. Da"e of p"rchase
5. Fail"re symp"oms, error codes appearing on "he display, and beep symp"oms
6. Proced"re index and page n"mber in which "he failing FRU was de"ec"ed
7. Failing FRU name and par" n"mber
8. Machine "ype, model n"mber, and serial n"mber
9. C"s"omer's name and address
No"e: D"ring "he warran"y period, "he c"s"omer is responsible for repair cos"s if "he comp""er damage
was ca"sed by mis"se, acciden", modiica"ion, "ns"i"able physical or opera"ing environmen", or improper
main"enance by "he c"s"omer. Following is a lis" of some common i"ems "ha" are no" covered "nder warran"y
and some symp"oms indica"es "ha" "he sys"em has been s"bjec"ed "o s"ress beyond normal "se.
Before checking problems wi"h "he comp""er, de"ermine whe"her "he damage is covered "nder "he warran"y
by referring "o "he following lis":
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