I have a dell c640. Just replaced battery and when I have it plugged
into the laptop, and plug charging cord in, the charging indicator
flashes orange twice rapidly then green. it cycles like this until I
unplug it. then when I return the plug it is a solid green. What does
this mean? Also, it does not charge when the laptop is powered down. The laptop only appears to be charging when it is powered up.
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Re: Dell c640 battery problem
This sounds like it is not getting enough amperage from the power brick- check which model power brick you have. I'm not 100% sure but the pa-6 family may not provide enough power to charge and run the laptop at the same time. the PA-9 should- if it's rated at 4.51 @20v - that works out to about 90watt. If you DO have a 90 watt power adapter and it's still giving the orange then red flashes- and will not charge when the laptop is off- you probably have either a bad battery, or the motherboard is faulty and has a bad charge circuit, or a loose power jack. What does pressing the little button next to the charge indicator on the battery do? Flashing every other led- 1,3,5 is BAD, so is 1 and 5. You also might have a 3rd party refurb- that had the guts torn out and is not properly "seen" by the laptop.
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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.
first, check that the battery connection isn't blocked by a sticker or something. second: try disconnecting the battery and ac and hold the power button for 1 minute. then give the battery and ac another try.
let us know how it goes.
if it still doesn't work, time for a warranty replacement.
Try taking out battery and plug in power. If it works, battery is faulty. If not, Try taking out your hard disk plug in power, if it works, hard disk is faulty. If not, Try taking out memory card, if there's a sound, memory card faulty. If no sound, it's your motherboard that is causing the error.
Note: If machine is under warranty no need to pay for the repairs.
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.
This sounds like a voltage regulator problem. You should have it serviced. If it is under warrenty contact dell, and if not any major computer shop should be able to assist you. Sometimes they can get the replacement parts and service this in store, but more often they will ship it out to have it serviced if it is at all possible. This is not a problem you can solve yourself without a significant amount of know how in laptop repairs. Please rate this solution below, as to how nobody has yet to do so for any of my solutions. Good Luck
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.
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.