Hi iv got a dell c640 when i swith it on the power goes off before it boots up I nearly got to safe mode once but power went again. The battery is ok but after it turns it self off its showing no signs of life. Cheers Steve

Try booting it up in safe mode. At the startup continuosuly press the F8 key repeatedly
Once you get to the Bootup option, select Safe Mode
After booting into safe mode, click on Start, All Programs, Accessories, System Tools, System Restore.
Restore to the date around when your laptop was working ok

Hi there,

Follow the below steps it would fix your issue.

Method 1: First you need to try safe mode and check if you are able to boot to the desktop.
Follow this below provided link to start your computer in safe mode.
Advanced startup options including safe mode
http://windows.microsoft.com/en-US/windows7/Advanced-startup-options-including-safe-mode
Method 2:
If you are able to boot into safe mode then in order to troubleshoot this issue further, you may unplug all the external devices except keyboard and mouse and check if you are able to boot to the desktop.

Method 3: If the above provided steps don't resolve the issue then, I would recommend you perform startup repair.
Follow these steps:

To perform a Startup Repair follow the steps below:

a. Please insert the Windows 7 DVD and reboot the computer.
b. When we are prompted to press a key to boot from the DVD, please press Enter or the space bar.
c. Choose your language settings, and then click Next.
d. Click Repair your computer.
e. Select the operating system you want to repair, and then click Next.
f. On the System Recovery Options menu, click Startup Repair. Startup Repair might prompt you to make choices as it tries to fix the problem, and if necessary, it might restart your computer as it makes repairs.

Access the link below for more information about startup repair:Startup Repair: frequently asked questions
http://windows.microsoft.com/en-US/windows7/Startup-Repair-frequently-asked-questions

This happens when set you PC on Safeboot Option.

Follow the steps mentioned below to boot in normal mode.

1: Once you are in the Safe Mode, Click on Start and then Click on Run.
2: Type msconfig (you will see system configuration utility).
3: Click on Boot.ini tab and check for the Boot Options.
4: You will see Safe boot options check.
5: Uncheck it then click on apply and then then ok.
6: Now your computer will boot in Normal mode.

Once you reach the desktop you will again see the system configuration utility screen. Just check the option don

Check to see if this problem follows in safe mode. Reboot and when the Dell splash screen comes up tap F8 until you see the multiboot options. Scroll to "safe Mode with Networking" let the machine boot up and see if you have a screen. If you do, right click on the desktop and set the resolution to 800 X600 and reboot normally. Usually when a screen goes blank in normal mode but shows up in safe mode means you have an incompatible resolution for the monitor or graphics adapter. This may be a driver issue or hardware. If the screen boots up in normal mode at the lower resolution, then try and go to properties again and bump the resolution up a bit, if it blanks again, try to go online and update the driver for the graphics chip.

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

Check the device manager to check if all your devices are working properly.

ok after you have booted in safe mode do a restore to a date just before the last day it worked properly and try that restore is found here

start/programs/accessories/system tools/system restore

hope this helps

try to boot into safe mode(by pressing F8 while booting)...If unable to boot in safe mode then u have to re install os again...

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.

Try removing battery for 10 min and then boot it up.