I have Dell XPS L702X
When I start the laptop it shows whole dark blue screen and flashy screen with white horizontal lines moving up and down...help
Sometimes lines are not shown but the screen flashes and flickers but it happens for just a second.
I will provide a link to the video i have made shortly.
Is there an external monitor or a TV to which you can connect this laptop to? If yes, Check if the display is perfect on the other monitor.
Please boot to BIOS by tapping F2 on the startup Dell logo to check if the lines are seen even there.
Also run a hardware diagnostics by to isolate the faulty component.
To enter diagnostics, Keep tapping F12 on the startup Dell logo that comes as soon you press the power button.
Select "Diagnostics" from the list, Run it completely and let us know if it passes, Else please reply with the Error message and validation code, we shall take it further.
Thank you for the update.
The LCD screen is faulty and needs to be replaced.
If the machine is under warranty, Please send us the service tag via private message, We shall look into the option on how do we go about replacing the part, If it is out of warranty, Please contact the Dell support in your geographic location