Question about Dell Inspiron 640m Notebook

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Inspiron 640m If I keep the computer on withtout using it (AC cord pluged) it turn off after 15 or 20 minutes. I tried other cords with the same results and without the battery. I'm not sure if the battery it's getting charged. Thanks for your help Ismael

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Portable batteries are considered a consumable item because as they are used, there is some degradation to the battery. The average life of a portable battery is 300 to 500 discharge/recharge cycles. After that point, the battery's ability to hold a charge slowly decreases, to where it will only power the system for 10 to 15 minutes even when indicating a full charge.

If this is the Original System Battery, then you will need to get a replacement battery to have the system run for a longer period on battery only.

Posted on Jul 03, 2009

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Hello there:
First you will want to ensure that the power cord is fully inserted at both the laptop and all the connections for the cord and that it is getting proper power. and check tosee that the connector thatthe power cord goes into is not loose if so this will have to be repaired
next remove the battery from the computer and unplug the power cord and then press in the power button for 1 minute than if this has a reset button on the back use a toothpick or a small item and pressin on the reset button for 30 seconds
now insert the power cord (NOT THE BATTERY YET)
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The power adapter does not have a temperature sensitive device, therefore it won't stop for overheating if not in consequence of a fault.

Try leaving the power adapter unplugged for about ten minutes.
In the meanwhile also remove laptop battery and put it back.
Connect it back to AC and laptop.
Ensure that connection to laptop and power cord connection to AC adapter box are both well plugged.
Before turning on laptop leave it connected for few minutes.
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A further test can be done using a multimeter to read voltage on AC adapter plug.

A replacement AC adapter is not expensive and can be purchased online. Try entering in Google your Toshiba model followed by the words "power adapter".

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Looks like you have some issues with the port on the motherboard where the AC adapter is plugged in. Try another AC Adapter cord in, if still the same, then call up Dell to have the motherboard replaced.

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Hi!

It's your ac adapter that is causing this issue. The ac adapter doesn't supply enough power or doesn't supply any power at all to the battery. Try to borrow another ac adapter from any inspiron system and if that works, then you need to replace the ac adapter, else, it's the motherboard.

Hope you find it helpful.

Thanks,

Karlox™ :)

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