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Hi i have a problem in lenovo 7757 . it was working good without battery on AC power but If i fix the bettery in it then after five minuts it was turn off automatically . i have changed this battery yesterday but steel this problem are shown tell me What will be problem in this.

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Are you getting 100% charge all the times?

Posted on May 18, 2011


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How ican know battary conector valtage

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IS your laptop getting charge? have you tried with if your charger is providing proper voltage? try with other charger removing battery.
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You said laptop is working fine if just using the battery,that means that there is nothing wrong with the battery itself. Can yu please try to connect the laptop directly to the power outlet without using the battery just for the mean time,remove the battery and connect the AC adapter directly to the power outlet then power on the laptop,if nothing happens,that means that there is something wrong with the AC adapter itself or the power port on the laptop.
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Unit keeps shutting down Lenovo 7757 Laptop.

Could be related to a heat issue if it just powers off for no apparent reason.

Try cleaning your fans our with some canned compressed air available at your local retailers such as Walmart, Fred Meyers, or Walgreen's.

However, if Windows displays that it is going to shut down due to low battery, you may try gauging if your battery life has significantly decreased. Less than 60 minutes is usually a good sign to replace the battery.

If Windows is just shutting down without any messages you can attempt to clean any malware off your computer by using Malware Bytes from Also looking using Microsoft Security Essentials as a normal virus scanner (free).

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sounds like the mother board maybe on its way out - is it under warranty?

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Hi.. I have a temporary solution to your problem. I had the same problem. Remove the battery and the ac adapter from the laptop. Just reconnect the ac adapter without the battery and switch on the lap. Presto.. Problem solved.. It doesnt power off anymore unless u remove the ac adaptor. Usefull if u hav needed files n want 2 create a backup. Still i havent found out a permanent solution to this problem. I suspect its a motherboard fault

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This is a failed power management system on the motherboard. The power management system regulates the power input, usage, allows the machine to switch from AC t battery, and controls the charging. When this fails it can cause problems ranging from battery not charging, power on battery only, power on AC or battery but not both, no power at all, and more. You will most likely have to replace the motherboard, however, there are a few places that do circuitry and component repairs on motherboards. Google motherboard repair facilities, get an estimate, and compare the price to a new board.

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