Question about Dell Latitude C640 Notebook

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Power & Battery in a Dell Latitude C640

As I read here before, I have the same problem, seems to me that the battery was too long without use or charge, so now is charging 100% and a life of 1 hour and 51 min (thats what WinXp says), but seems to me that eventhough charges the battery but the notebook not works with just the power cord or brick, is some where a setting that have to be changed or do I have a problem with the board? Any light will be apreciated!!

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  • chapincito Dec 29, 2007

    Good!!! I went to the place where I bought it and they gave me another brick, we do not care about the battery, so now we are using it without problems.



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  • 188 Answers

If the laptop does not run plugged into AC power, then you may have a defective power brick or a power problem with the laptop.

I would try another power brick. If that doesnt do it then your power jack inside the machine may be damaged and usually that means the motherboard is cracked. The only fix in that case is a new motherboard ($150-$200 plus labor) OR you can get the Dell C PORT II port replicator which has its own power jack.

Hope this helps!

Posted on Dec 28, 2007


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You might want to try another AC adapter. If it works, then call up Dell and have replacement on the AC adapter. Otherwise, call up Dell and have them check your motherboard. If the warranty is still active, then can still definitely replace that.

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get to the main board of ur system there is a jumper near the battery .
change its position while power is off and get it back to its previous position. this way u will reset cmos to default.
if the computer starts hit delete to enter setup and load system changes then exit.
ps: defected processor could be the cause

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