It seems that problem that ur facing is manly related to drivers but try booting into safe mode and incase ur screen look normal in it try installing the driver from support.dell.com.or check in bios and check the screen in case ur screen is still bad then contact dell
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Probably either the graphics chip ( if it behaves like this on an external monitor), if not, issues with screen failing ( you have not had it close to a magnetic source have you? such as a hoover, fridge, tv speakers?. This would cause the problem
In any event, given that its only 6 month old it should be under warranty, my advice, return it and demand a replacement
When was the last time your display was okay? Try system restore, and restore it to that certain date.Just type system restore at the start search just above the start menu, then follow the prompts. If that doesn't work, a video card replacement should be done. Since its a laptop, possible motherboard replacement could be the last resort to solve this.
You most likely have a bad LCD panel on your laptop, and to verify that is the problem, connect up a desktop monitor to the external VGA connector, and toggle to the external display. If it has a good display on the external monitor, you have a bad LCD panel. If the color band is still showing up on another monitor, you have big problems!
Check the display on the external monitor. if the display if fine, you lcd needs to be replaced. if the display is the same, your computer mother board has gone bad. here is what you can also try before calling Dell.
Turn off your computer. now, press and hold the Fn button at the bottom left hand corner. and then turn on the computer. kepp holding the Fn key down untill you see Pre boot self assesment. it will check all the hardware problems in the computer. After 2 minutes it will show you a rainbow. if the colors are fine press Y else press N. it will give you an error code. call dell and give the error code and get the LCD repalced.
If you have a LCD-screen, not an old-style CRT-screen, it is the data-cable, and its connections, that are not transmitting one of the 3 "primary" colours, e.g., mix red & blue & green to get white,
but mix only two of those colours, and you could get pink,
because the mixing is an "additive" process.
If you mix NONE of the 3 primary colours, you should get BLACK.
If you see GREEN, you're seeing ONE of the primary colours.
A pink or red screen which may gradually turn back to it's appropriate color indicates the lcd is going out. It could last quite some time in tht condition, but it's going. replacement isn't too bad though.