20 Most Recent Dell Latitude C640 Notebook Questions & Answers

Here's a link to the Dell support article you need to try... Knowledge Base

chances are the actual power jack in the laptop has gone bad. this is a common issue with lots of laptops and every dell laptop (4) that i have owned http://www.ebay.com/itm/like/281152320878?ul_noapp=true&chn=ps&lpid=82

its the problem with the keyboard. make sure Function key is not pressed while turning on the computer. normally it happens only then. if the problem presists try reseat the keybaord. to see how to reseat the keyboard.
NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries.
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by touching an unpainted metal surface on the computer.

1. Remove the hard drive.
   
   
2. Turn the computer over, and remove the five M2.5 x 12-mm screws labeled "circle K."
3. Turn the computer over and open the display.

NOTICE: The keycaps on the keyboard are fragile, easily dislodged, and time- consuming to replace. Be careful when removing and handling the keyboard.

1. Remove the center control cover:
   
   
2. Insert a small, flat-blade screwdriver or plastic scribe into the notch at the right end of the center control cover and pry up the cover.
   
   
3. Lift the center control cover up and away from the bottom case.
4. To release the keyboard from the palm rest, use a small, flat-blade screwdriver or plastic scribe to pry up the right edge of the keyboard near the blank key.
5. Lift the keyboard straight up about an inch and then rotate it forward toward the front of the computer, until the key face is resting on the palm rest.

NOTICE: Do not pull on the keyboard flex and track stick cables.

Pull up on the keyboard connector to disconnect it from the keyboard interface connector on the system board.
Remove the keyboard from the bottom case

See the images below for ready refference




To repalce the HDD see the image below


I am sure this will fix the computer. Because in this you are reseating the HDD as well. all the best.

Check this http://www.manualslib.com/manual/678368/Dell-Latitude-C640.html

flux program is all you need

its an older lcd screen. so try to replace the screen or get a notebook cooler to cool it.

Hi mydear921 , What OS is installed on this system? Have you tried holding down fn key and then tap f1 key once. Let me know if that worked.

Hi, I think the Laptop you have is E6400, Steps to Remove the Battery. They are 3 Release Latches to remove the Battery. 1) Make Sure all cables including Power cord is unplugged. 2) Please look at the image attached. 3) Turn the Computer Upside Down. 4) I have numbered the Latches. Latch# 1 - Slide the battery door release latch# 1 into the unlocked position and Slide the battery door release latch# 1 toward the base of the system. 5) Latch# 2 and 3 - Slide the battery release latches into the unlocked possition. 6) Open the battery door on Latch# 1 7) Using the battery pull tab slide the battery out of the system. Let me know if you need any other help. Thanks

Hi, It really prolongs your battery life. I would recommend to keep it this way, while I don't know where to find the menu option to change it back.

your System may be slow due to following reason - Too many programs running at startup or in the background- Data Corruption, hard disk fragmentation- Missing Windows updates or outdated drivers- Not enough hard drive space, too many unused programs- Left over programs, old cached and temporary filesSo Follow these steps to fix computer problem::- Delete all the temp files- Remove unused programs- install latest drivers from the manufacturer site- Install and run antispyware software- Free up wasted space with Disk Cleanup tool- Defragment your hard disk driveIf you are unable to perform above tasks then use a single utility tool like PC Fresher that will fix windows errors that cause of system slow

Press either Ctrl+Shift+DownKey

or it may be the UpKey. Try both :) one of them will get your screen back to normal

If you are using Windows XP, go to Control Panel > Network Connections. Right click on Local Area Connection and then click Enable. (This is only applicable if the ethernet port is disabled).

Also, you may go to Device Manager (Right Click My Computer > Manage > Device Manager) and then check if the ethernet is disabled or has a question or exclamation mark.

If both dont work, your ethernet controller is broken.