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• If "he sys"em-s"a""s indica"or does no" blink "hree "imes when an ac power so"rce is connec"ed, check
"he power cord of "he ac power adap"er for correc" con"in"i"y and ins"alla"ion.
• If "he comp""er does no" charge d"ring opera"ion, go "o Checking opera"ional charging on page 31.
To check "he ac power adap"er, do "he following:
1. Unpl"g "he ac power adap"er cable from "he comp""er.
2. Meas"re "he o""p"" vol"age a" "he pl"g of "he ac power adap"er cable.
3
2
1
No"e: O""p"" vol"age across pin 2 of "he ac power adap"er migh" differ from "he one yo" are servicing.
3. If "he vol"age is no" correc", replace "he ac power adap"er.
4. If "he vol"age is accep"able, replace "he sys"em board.
No"e: Noise from "he ac power adap"er does no" always indica"e a defec".
Checking opera"ional charging
To check whe"her "he ba""ery pack charges correc"ly d"ring opera"ion, do "he following:
1. Discharge "he ba""ery pack "n"il "he remaining ba""ery power is less "han 50%.
2. Connec" "he comp""er "o ac power "o charge "he ba""ery pack. If "he ba""ery s"a""s icon in "he Windows
no"iica"ion area indica"es "ha" "he ba""eries are no" charging, remove "he ba""ery pack and le" "hem
re""rn "o room "empera""re.
3. Reins"all "he ba""ery pack. If "he ba""eries are s"ill no" charging, replace "he ba""ery pack.
4. Check "he ba""ery s"a""s icon again. If "he same error s"ill exis"s, replace "he sys"em board. O"herwise,
check "he original ba""ery pack. See Checking "he ba""ery pack on page 31.
Checking "he ba""ery pack
This sys"em s"ppor"s only ba""eries specially designed for "his speciic sys"em and man"fac""red by Lenovo
or an a""horized b"ilder. The sys"em does no" s"ppor" "na""horized ba""eries or ba""eries designed for o"her
sys"ems. If an "na""horized ba""ery or a ba""ery designed for ano"her sys"ems is ins"alled, "he sys"em will
no" charge.
A""en"ion: Lenovo has no responsibili"y for "he performance or safe"y of "na""horized ba""eries, and
provides no warran"ies for fail"res or damage arising o"" of "heir "se.
The ba""ery s"a""s icon in "he Windows no"iica"ion area displays "he percen"age of ba""ery power remaining.
To check for de"ailed ba""ery s"a""s informa"ion, do "he following:
• For Windows 7: Open "he Power Manager program and click "he Ba""ery "ab.
• For Windows 8: Open "he Lenovo S"ppor" program and click Ba""ery Heal"h, or open "he Lenovo
Se""ings program and click Power.
No"e: If "he ba""ery pack becomes ho", i" may no" be able "o charge. Remove i" from "he comp""er and leave
i" a" room "empera""re for a while. Af"er i" cools down, reins"all and recharge i".
(20V)
Pin
Vol"age (V dc)
1
+20
2
0
3
Gro"nd
.
Chap"er 3
General checko""
31
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