Question about Dell Latitude C640 Notebook

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Black screen only

Hello, My daughters laptop (latitude c640), appears to power up, but we end up with a black screen. It does not appear to be in sleep or hiber mode, as hitting power button once does not wake it. Suggestions? Help!

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  • rheroux472 Apr 14, 2009

    All set. Reconfigured to last known working mode.

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Try to hold power button, until shutdown. Remove battery. Connect power cord and try to boot again.

Posted on Apr 14, 2009

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I have just reformatted a Dell latitude c640 laptop for a friend and installed windows xp pro up to service pack 2. upon reload first time the laptop is suffering screen tearing issue, it is like the...


It appears to be the issue with the ram. Turn off laptop, remove battery and unscrew the the cover to the RAM. Its on the back panel. Remove and reseat the RAM after cleaning the gold pins.

You can also use the Microsoft memory diagnostic tool.

Sep 25, 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

Will a Dell CPX sreen fit as a replacement on a Dell Latitude PP01L


hello ! I don't think so coz there made different and diferent connections .

And if not carefull u will end up burning that screen
S i suggest that u get a new cpx screen and fix it

good luck dude

Sep 08, 2009 | Dell Latitude C640 Notebook

1 Answer

My dell Inspiron 1318 laptop's battery is not charging.


check power supply see if its putting out voltage to laptop

Mar 29, 2009 | Dell Latitude C640 Notebook

1 Answer

Booting problem


Try putting the computer into safe mode by holding down on the F8 button and selecting safe mode during the boot process. Once you get to the safe mode screen and windows appears, restart the computer.

If that doesn't fix the problem you will have to restore Windows.

Jun 12, 2008 | Dell Latitude C640 Notebook

1 Answer

Dell Latitude cpx


Symptoms of a Bad Video Driver

Monitor Resolution issues:
screen flickers, screen is cloudy, screen shows horizontal lines, screen goes black, goes blank, goes into sleep mode, goes into power mode, size magnifies or reduces, video is jittery, fonts change, screensaver will not appear, cannot extend display on dual monitors.

Download it from here
VIDEO DRIVER FOR LATITUDE

May 28, 2008 | Dell Latitude CPX Notebook

1 Answer

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.

Dec 16, 2007 | Dell Latitude C640 Notebook

1 Answer

Red vertical lines appear, can only run computer in Safe Mode


check the video cable and see if it;s properly seated. run the laptop with something that uses memory. if the video chip it going to show signs of problems, it will be more prominent when the laptop gets hot. most cases laptop motherboards have integrated video cards and cannot be replaced.

Aug 27, 2007 | Dell Latitude C640 Notebook

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