My laptop is turning on but the screen is not turning on And the right

Mohit Soni connect an external monitor. If that comes on and shows your desktop you know that your screen is the issue. In a darkened room and with the computer on, shine a flashlight at an angle against the screen. See if you faintly see the desktop. If so it is your backlight. For any of those repairs you will have to pen your laptop and check the display connectors as well as the main board depending on what your findings are. These guides Dell Latitude D630 - iFixit will help you to work on your computer. If you need to post some images , you can do that by editing your QUESTION and follow this guide Adding images to an existing question - iFixit Repair Guide