Lenovo E40-70 Hardware Maintenance Manual - Lenovo E40-xx Notebook - Page 29

Checking the external battery pack and the operational charging

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Note: Output voltage of pin 2 of the ac power adapter might differ from the one you are servicing. 3. If the voltage is not correct, replace the ac power adapter. 4. If the voltage is acceptable, replace the system board. Note: Noise from the ac power adapter does not always indicate a defect. Checking the external battery pack and the operational charging Checking the external battery pack This computer supports only batteries specially designed for this specific system and manufactured by Lenovo or an authorized builder. The system does not support unauthorized batteries or batteries designed for other systems. If an unauthorized battery or a battery designed for another systems is installed, the system will not charge. Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use. The battery status icon in the Windows notification area displays the percentage of the battery power remained. To check for detailed battery status information, do the following: • For Windows 7: Open the Power Manager program and click the Battery tab. • For Windows 8 and Windows 8.1: Open the Lenovo Settings program and click Power. Note: If the external battery pack becomes hot, it may not be able to charge. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it. Checking the operational charging To check whether the battery pack charges properly during operation, do the following: 1. Discharge the battery pack until the remained battery power is less than 50%. 2. Connect the computer to ac power to charge the battery pack. If the battery status icon in the Windows notification area indicates that the battery pack is not charging, remove the battery pack and let it return to room temperature. 3. Reinstall the battery pack. If the battery pack is still not charging, replace the battery pack. 4. Check the battery status icon again. If the same error still exists, replace the system board. Chapter 3. General checkout 23

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Note:
Outputvoltageofpin2oftheacpoweradaptermightdifferfromtheoneyouareservicing.
3. If the voltage is not correct, replace the ac power adapter.
4. If the voltage is acceptable, replace the system board.
Note:
Noisefromtheacpoweradapterdoesnotalwaysindicateadefect.
Checkingtheexternalbatterypackandtheoperationalcharging
Checking the external battery pack
This computer supports only batteries specially designed for this specific system and manufactured by
Lenovooranauthorizedbuilder.Thesystemdoesnotsupportunauthorizedbatteriesorbatteriesdesigned
for other systems. If an unauthorized battery or a battery designed for another systems is installed, the
system will not charge.
Attention:
Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
The battery status icon in the Windows notification area displays the percentage of the battery power
remained.
To check for detailed battery status information, do the following:
• For Windows 7: Open the Power Manager program and click the
Battery
tab.
• For Windows 8 and Windows 8.1: Open the Lenovo Settings program and click
Power
.
Note:
Iftheexternalbatterypackbecomeshot,itmaynotbeabletocharge.Removeitfromthecomputer
andleaveitatroomtemperatureforawhile.Afteritcoolsdown,reinstallandrechargeit.
Checking the operational charging
Tocheckwhetherthebatterypackchargesproperlyduringoperation,dothefollowing:
1. Discharge the battery pack until the remained battery power is less than 50%.
2.Connectthecomputertoacpowertochargethebatterypack.IfthebatterystatusiconintheWindows
notification area indicates that the battery pack is not charging, remove the battery pack and let it
return to room temperature.
3. Reinstall the battery pack. If the battery pack is still not charging, replace the battery pack.
4. Check the battery status icon again. If the same error still exists, replace the system board.
Chapter 3
.
General checkout
23