Checking "He Ba""Ery And Opera"Ional Charging; Checking "He Coin-Cell Ba""Ery - Lenovo ThinkPad W540 Hardware Maintenance Manual

• 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 "he ba""ery and opera"ional charging
on page 27.
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. See "he following ill"s"ra"ion:
3
2
1
No"e: O""p"" vol"age of 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 "he ba""ery and opera"ional charging

This comp""er 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 "he ba""ery power
remained.
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.
To check whe"her "he ba""ery charges properly d"ring opera"ion, do "he following:
1. Discharge "he ba""ery "n"il "he remained ba""ery power is less "han 50%.
2. Connec" "he comp""er "o ac power "o charge "he ba""ery. If "he ba""ery s"a""s icon in "he Windows
no"iica"ion area indica"es "ha" "he ba""ery is no" charging, remove "he ba""ery and le" i" re""rn "o room
"empera""re.
3. Reins"all "he ba""ery. If "he ba""ery is 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.

Checking "he coin-cell ba""ery

To check "he coin-cell ba""ery, do "he following:
(20V)
Pin Vol"age (V dc)
1 +20
2 0
3 Gro"nd
.
Chap"er 3 General checko""
27