ok, then you have two options here
First note there is a good chance the hard drive is not going to work again and you have lost some if not all data, but you only know this by trying to get the data off it and attempting a factory restore.
First, you need to remove the hard disk from the Laptop. This entails dissasembling it. Its not an easy task so if you do not feel comfortable doing this, take it to a computer store to have them do this and put the data to a Disk for you.
If you do feel ok doing this, you will need to purchase this adapterhttp://www.amazon.co.uk/SATA-Hard-Drive-Adapter-Cable/dp/B001OORMVQ
Then you connect the adapter to the hard disk and the other end of the adapter to another computers USB port and you can access the files like any USB memory stick ect.
Then put the hard drive back in the laptop and attempt to restore the computer to new by doing the following
Turn on the computer.
As the computer starts, press on the keyboard until the
Advanced Boot Options menu appears on the screen.
You must press before the Windows logo appears on the screen. If you press after the Windows logo appears on the screen, the Advanced Boot
Options menu will not appear on the screen. If you do not see the
Advanced Boot Options menu, restart the computer, and then repeat this step until you see the menu on the screen.
Press the on the keyboard to select Repair Your
Computer on the Advanced Boot Options menu, and then press .
Specify the language settings that you want, and then click Next.
Log in as a user who has administrative credentials, and then click
Click Dell Factory Image Restore.
In the Dell Factory Image Restore window, click Next.
Click to select the Yes, reformat hard drive and restore system
software to factory condition check box.
The computer is restored to the default factory configuration.
When the restore operation is completed, click Finish to restart the computer.
As F8 did not work before, I am concenred this wont be possible, which means the hard disk has faulted and will need to be replaced. You will only know this though after completing the above steps.
If you would like any additional information or assistance, please do not hesitate to let me know.
And if you can take a second to rate my service, that would be greatly appreciated.