Question about Dell Latitude CP DC Board Graphic Card

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Dell Latitude C540 screen goes dark when adapter is pluged in

Hello.. i recently received a Dell Latitude C540 and it runs fine on the battery but as soon as i plug the adapter into the laptop the screen gets very dark but the laptop stays on and runs fine, and then to fix the problem i have to unhook the adapter and restart it, at first i thought it might have been the jack but that seems to be working fine because it charges the battery and i ran a 24 hour test,then i thought it might be the inverter but that works fine while its on battery power, so at this point im clueless any help would be great...thanks

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  • Handal Jan 25, 2009

    My Dell Inspiron 1520 does the same thing. When adapter is plugged in after 3-20 min screen goes dark, with just battery power it works fine. Tried a knew adapter but it the done the same thing. Help.

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1 Answer

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  • Dell Master
  • 20,180 Answers

Right click on the battery icon on screen and set the power and screen brightness as you require.

Posted on May 02, 2017

6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

Kegtapper
  • 94 Answers

SOURCE: Dell latitude D600 battery charge light flashing

You have a ground fault issue in the DC JACK.

There are escentially 4 circuits in the jack and one is not making contact.

1: Negative Charge circuit (outter ring)
2: Negative Run circuit (outter ring)
3 Positive (Inner Ring)
4: Signal (center pin)

I believe the negative charge circuit (outter ring) is not making contact internally. Typically what happens on that model DC Jack is the tension contact metal becomes fatigued, and does not touch the outter ring.

This could come from Heat causing early fatigue of the metal.
Or normal wear, the metal has simply worn out from regular insert/removal.


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Don't forget to rate suggestions

Posted on Apr 01, 2008

The Machine
  • 788 Answers

SOURCE: Dell Power Supply

You can test the power supply using a multimeter. I use a paper clip to get in the middle if my multimeter probe is too large. If there isn't any power but the light on the power brick is on (if there is one) then there is most likely a break in the cable. In any case turn to eBay for a replacement, should be quite easy and inexpensive to find. Or you could pay more and get one from Dell. Companies like APC and Targus make usniversal adapters but they're expensive and not optimal.

Posted on Jul 14, 2008

farhangM
  • 64 Answers

SOURCE: Monitor keeps going dark

It sounds like a LCD backlight problem. Bring it to an authorized repair shop.

Posted on Dec 02, 2008

Dipu007
  • 2110 Answers

SOURCE: problem regarding graphic card

It is bcoz the game required VESA graphics that ur mother board does not have..

Posted on Dec 09, 2008

ComputerGirl
  • 85 Answers

SOURCE: dell inspiron 5150 dark screen, faint image in background

ah, change the backlight it is most likely dieing
-CG

Posted on Jan 23, 2009

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My dell ppo1l laptop screen is dark. I tried adjusting the contrast and Its still dark what should I do?


If it's plugged in and not running on batteries then it sounds like your screen is going out on you.

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My Dell Latitude D620 laptop will not boot up unless I hold the power button down. The computer will run fine if I keep holding the power button down. It will also keep running if I hold down any key. As...


Hello.

The most common reasons for power issues are the battery, power jack and power adapter/cord.

Power off and remove the battery. If the laptop powers on with just the adapter connected, your battery is faulty.

If you move/wiggle the power adapter at the point where it connects to the laptop, and the power goes off and on, the power jack is the problem.

The power jack is inside the laptop and either needs soldering or replacement. If a power jack problem, it should be addressed by someone knowledgeable.

If no change, the power adapter is probably faulty and needs replacement.

Hope this helps.

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How replaqce the main battery on dell latitude c540/ 640 laptop


It pops right out. Just look at the new battery and then figure out where it goes, usually there is a little switch / latch.

Feb 22, 2009 | Dell Latitude C400 Notebook

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Battery stopped working


Hey,

Test your charger, the battery light blinking and the computer not starting up indicates not enough power to start up or not pluged into ac power, check the power adapter or charger. I suspect the battery is fine.

Thanks,
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Feb 15, 2009 | Dell Latitude D600 Notebook

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Dell Latitude C540/C640


I think you are wasting a lot of effort, I know how you feel and sometimes you cannot win.
Junk it for parts.

I do volunteer work for Technical Aid For the Disabled (a charity organisation) and repair/refurbish laptops and computers for disabled people and I hate to see good computers go to waste.

Nov 14, 2008 | Dell Latitude C640 Notebook

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Dell Latitude C540/C640


ya u can try to chnag ethose how much is the mobo on ebay for one of these also new mobo may be your best bet even fixing them still may not work for u thats 50 50 chance

Jan 22, 2008 | Computers & Internet

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Dell Latitude C540/C640


Wow Buddy. I'm impressed with your work here.
I have seen many boards which were oem, which had what appeared to be 'add on' circuitry. It's common when a problem arises in a product, which they've already had a million of manufactured. Otherwise, maybe the NSA, CIA, or MA Bell doing a little snooping?
Ok just kidding.
Assuming the circuitry which was replaced was still there, I've experienced a couple of "no power" issues on these models.
Bad power board.
AC adapter socket unsoldered from board.
Dead short between motherboard and palmrest/case.
Bad memory.
Burned capacitors.
Best thing since it's apart already, just order another board and you'r good to go.
I sell the same board at my shop for 75-100.00 US.
If the processor's good, then you should be good to go.
Good luck

Jan 22, 2008 | Compaq Presario X6000 Notebook

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