Top 20 Dell Latitude C640 Notebook Questions & Answers

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

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

flux program is all you need

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

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 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.

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programs running at startup or in the background- Data Corruption, hard disk fragmentation- Missing Windows updates or outdated drivers- Not enough hard drive space, too many unused programs- Left over programs, old cached and temporary filesSo Follow these steps to fix computer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

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.

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

If the laptop battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced. Rechargeable batteries will fail if stored in a discharged state for long periods.

Next create a Username and company name (normally Home is all you need). Further into the installation, you will be required to put in the Installation code. During the final stages of installation you need to create an User or Users that will use this computer. When you finished installing Windows you need to install the laptop's device drivers. You need to use a computer with Internet access to download these drivers from the laptop manufacturer's WEB site and install these drivers on your laptop. Next connect a LAN cable to the LAN port from your computer to your DSL or cable modem and you need to Activate the Windows installation on the Microsoft WEB site. Next up need to upgrade Windows from the Microsoft WEB site including Service pack. Next you need to install your programs

Did you set up your laptop at your friends house? Have you ever used it with the wireless access point at your house? Is the wireless adapter turned on? Do a search for available wireless networks look for your SSID click on connect, enter your security code.

hello,You can connect simply be swiching on the wifi on your laptop serch a network(there are some free hot spots) and click connect

combination of switch to turn on or of wireless adapter on laptop see manualpress switch on your laptop to turn on of wirelessinstall drivercheck in bios for turn on of cardhave fun

try to change your charger.

POWER SUPPLY & BATTERY PROBLEMIf thelaptop battery is more than 3 - 4 years old then the battery could be worn out.Rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up at all. OR Thebattery shows a 100% charge but when the adapter is disconnected the batterydrops off to zero capacity in a very short time. If the battery drops to anunacceptable charge level then the battery needs to be replaced.Whenyou connect the power adapter into the laptop, does the power LED lightup? If not then -The battery adapter or the adapter's power lead or the laptop's powersocket could be faulty.Check power adapter's DCplug that connects into the laptop power socket with a multi-meter, the voltageshould be slightly higher than the voltage that is printed on the label on thebottom of the adapter. If the voltage is zero or way below the voltage that isprinted on the label then the power adapter is faulty and needs to be replaced.If the adapter is OK thenconnect it to the laptop and power it up, then look at the power/batterycharging LED light and wriggle the power plug in the laptop's powersocket. If the power/battery LED light flashes and in a certain position thisLED light stays firm, then the power socket is either faulty or it has a drysolder joint where it is connected to the motherboard.This can be repaired but itrequires the laptop to be completely dismantled to get at this power socket andrepair. If you cannot DIY then I suggest you get a quote first.

Sounds like your graphics card has broken, If you have 2 display ports on the back of the pc, try plugging it into that one

If thelaptop battery is more than 3 - 4 years old then the battery could be worn out.Rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up at all. OR Thebattery shows a 100% charge but when the adapter is disconnected the batterydrops off to zero capacity in a very short time. If the battery drops to anunacceptable charge level then the battery needs to be replaced.Whenyou connect the power adapter into the laptop, does the power LED lightup? If not then -The battery adapter or the adapter's power lead or the laptop's powersocket could be faulty.Check power adapter's DCplug that connects into the laptop power socket with a multi-meter, the voltageshould be slightly higher than the voltage that is printed on the label on thebottom of the adapter. If the voltage is zero or way below the voltage that isprinted on the label then the power adapter is faulty and needs to be replaced.If the adapter is OK thenconnect it to the laptop and power it up, then look at the power/batterycharging LED light and wriggle the power plug in the laptop's powersocket. If the power/battery LED light flashes and in a certain position thisLED light stays firm, then the power socket is either faulty or it has a drysolder joint where it is connected to the motherboard.This can be repaired but itrequires the laptop to be completely dismantled to get at this power socket andrepair. If you cannot DIY then I suggest you get a quote first.