Question about Dell Latitude C640 Notebook

3 Answers

Dell c640 not charging battery

Sir my laptop is not charging the battery but it works online with A.C supply

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  • 5 more comments 
  • rotimiowolab Oct 06, 2008

    if i plug my pc for charging the computer indicate, but after some hours i still not found any percentage on my battery.

    help me with that.

  • Anonymous Oct 26, 2008

    yea same thing happens to me i have 2 batteries but still only 1 sucks for the time without ac :s



  • bagoanie Mar 01, 2009

    my dell laptop is no longer charging or working with ac plugged in

  • ecpooh Mar 05, 2009

    The screen size is not the size of the monitor on my dell latitute 640 laptop. Can someone explain how to reset the screen so that it is the entire size of the monitor? I would appreciate it.

  • CGmiller63 Apr 10, 2009

    Dell C640 not charging the battery. I had a shop troubleshoot the laptop and they said the it was getting voltage to the charging system. The battery is new so it cannot be be that. Not sure where to go from here.

  • Anonymous Apr 21, 2009

    my laptop battery seems to have the same problem as it does not charge while the laptop is working on AC power. plz give me a helpful solution immediatly.

  • murtazaree Apr 21, 2009

    "dell c640 not charging battery"

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3 Answers

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I have found a few things with this model, first if the laptop works on ac power when the battery is out then try pushing the button on the battery itself and see how many lights light up. If they are not green replace the battery it just wore out. Second if you can wiggle the power cord and you see the charge light flash on and off then the solder joints are cracked on the main board and you will have to take the main board out of the case and drill out the 3 rivets on the metal bracket covering the plug and bend it out of the way then there are a small brown and a small black block near the plug resolder the ends of these facing the plug. bend the bracket back into place and epoxy it where it was. put the main board back in the case hook all the stuff back up and now it will charge your battery. If you are not good at this stuff I would not try it yourself. I have fixed 2 c640s this way and it is slow careful work.

Posted on Oct 05, 2009

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If the battery light is flashing orange then the battery is shot. Even if it's not flashing try replacing the battery. If it coorects the problem great, if not this will rule out one thing that it isn't. Batteries can be a big issue with Dell machines when they start to wear out.

Posted on Jun 24, 2008

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I use Family 9 AC Adapter with C640 Latitude laptop. But Relevant Adapter is Family 6. is that bad ?

Posted on Dec 26, 2010

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1 Answer

C640 stopped powering up


If it will not power on from battery or AC adapter, Either the power switch is bad - OR the motherboard is shot - OR the LCD is not working. I would suggest taking it to a local PC shop and having it diagnosed, usually this costs about $30 I work for TechSupportPros of Spokane, WA and charge $30 to diagnose computers.

Feb 05, 2010 | Dell Latitude C640 Notebook

2 Answers

My daughters power supply for her C640 has a pinch


I suggest you DONT USE PINCH POWER CORD FOR SAFETY.

PLEASE TELL ME IS YOUR POWER CORD & THE PINCHED CORD ARE SAME? I MEAN SAME MODEL? AFTER PLUGING OF YOUR CORD, THE BATTERY CHARGING LIGHTS ITS ON? IF NO THEN I GUESS THAT CABLE NOT SUPPORT HER LAPTOP.
VISIT A DELL SERVICE CENTER OR A SHOWROOM AND BUY NEW CORD WHICH IS MADE FOR YOUR DAUGHTER LAPTOP MODEL.
OTHER WISE SOME CHANCES OF SHORTCIRCUIT ON MOTHERBOARD.

Thanks, i am waiting for your feed back & if you satisfied then thumps me please.

Jan 31, 2010 | Dell Latitude C640 Notebook

1 Answer

Dell c640 charging problems.


Instead of spending alot of time trying to do something that could potentially harm your laptop..why not just buy a power supply?

You can get one here Click here for about 16 dollars. That's a great deal they are usually about $60 and its a Dell brand not some off brand.

Good Luck

Jan 18, 2009 | Dell Latitude C640 Notebook

1 Answer

C640 power issue


To my surprise, dell provides dis-assembly instructions online: http://support.dell.com/support/edocs/systems/latc640/sm_en/sysboard.htm#1000473

I have the same problem but didnt see a bad solder (resoldered all connectors with no success). I may have a bad AC power supply or bad charge circuit - no idea)

Jan 05, 2009 | Dell Latitude C640 Notebook

3 Answers

Dell c640 none charging battery


The small one inside is for saving the BIOS data and the Internal Clock as just like in a regular desktop. That shouldnt need replacing unless its just very old. But even if the internal battery goes bad, it should still charge and work.

If the charge light isnt comming on, then its most likely the mother board went bad or the battery. Power it on and when in windows, right click on the desktop, click Properties.

Go to the screen saver tab and at the bottom, click the power options, go to the battery and see if its even detecting it. If it doesnt detect it at all, its probably a bad mother board or connector. Even a dead battery would show.

Jan 05, 2009 | Dell Latitude C640 Notebook

1 Answer

No power


check your power supply and make sure the proper power at the ends and the light is on the power supply, I no those C640 s have a problem with the darn plug in and the pins in the laptop may have got bend or broken check that out and if all the pins are not bent. your power supply may be bad check that out, if so you can go to Dellsupport.com and order one for fairly cheap. I think that will fix your problem.

Dec 21, 2007 | Dell Latitude C640 Notebook

3 Answers

Latitude C640 is dead!!


Hi,

I have the exact same issue. It's not the processor. If you have you power supply tested, you will probably find that it's not working anymore. The green light still comes on when plugged in, but it's not sending the "charge" to the notebook.

I have this issue with a couple of C640's. I've tested the machine by charging the battery in another (Pentium 3 Dell C600), then putting it back into the broken machine... woohoo it works.

Unfortunately I can't figure out why the power supply's keep on busting, I don't think that the power-supplies are faulty, or maybe they just get old, don't know, but the most obvious problem is probably something with the mainboard, which really sux.

Hope this helps,

Oct 09, 2007 | Dell Latitude C640 Notebook

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