Lost display suddenly on inspiron 1721 (dell)

reinstall Ubuntu is the only way

what does the error say for me tobe able to help you

Do you mean the LCD screen with the lid?
If so you undo the hinges and disconnect the video and power leads to the inverter.
This WEB site shows how to remove the screen/hinges.
Replacing Display hinges
http://www.laptopparts101.com/display-screen-hinges/

You maybe have clean up your Dell inspiron 1721 and maybe your unit or processor were overheated during burning. First, clean up by removing a dust from the unit by blowing air. Sometimes even by mouth with several times enough.
Second maybe necessary to clean up your operating system by removing unnecessary programs from autoloading when a computer starts. This will increase volume of computer memory. You can use program CCleaner free version.

Windows has been corrupted beyond repair - time to reinstall.

Hi. You may need to reseat the hard drive by pulling it out and pushing it back in. If the system still won't boot to windows, and displays a " No Bootable Device Found" then you must have a busted hard drive. you may end up replacing the hard drive.

Hope it helps... ^_^

try configuring your display settings on the laptop before connecting. I have a HP dv7 and it was doing the same thing until i configured it for a secondary display

ok, theres a small issue with the raid controller. You have to install a 3rd party raid driver (its on the dell cd) to continue, OR, you can set that BIOS's hard drive controls to ATA or LEGACY (legacy would likely work best, but youd have no 'raid' functions, but who sets up raid drives on a notebook?). Your last option is use the dell discs to restore, and inssert the windws disc when prompted

If you are lucky, the system is running Windows XP home edition. Boot to the Safe mode (F8) at boot, and see if you have an option for an ADMINISTRATOR account if there is, the password should be blank. Then you can boot to that account, and reset the password on your account.

Here is a link to more information on dealing with a forgotten password.

http://www.askvg.com/how-to-reset-recover-forgotten-windows-nt-2000-xp-2003-administrator-password/

do a hard shutdown by holding the power button down until all the lights and power go off. reboot and then right click on the desktop and select properties. go to the screen saver tab and then the power tab set the side when it is plugged in to never turn off monitor, never turn off hard disks, never go on standby. Of course you can set other time limits, but remember that it will go back to hibernating if the limit is exceeded.
hope it helps