I have two problems on the display. The first issue concerns a tendency on the left side of the screen to green, while on the right side to red; the second concerns a variation of brightness and colour for a duration of a fraction of second. This instability often occurs.
What is the exact system model? What is the current OS installed on the system? When do you encounter the distortions on the display? When did the issue start? Is the issue persistent or does it occur at random intervals of time? Do they fade out automatically? Does this happen with or without the adapter connected?
Does an external monitor work fine?
Check for the distortions in the following:
Restart the system and press f12 key on startup - choose diagnostics. Let it run the diags and if you encounter any errors - make a note of the complete error and report the same to us.These are onboard diagnostics and they might possible pick some error if the hardware is not functional.
Run the LCD bist - Turn off the system and press and hold the "D" key + power button to turn on the system and it should run the LCD built in self test - see this link for more info - http://dell.to/1SkXNrG
Restart the system and press f2 key on startup to enter BIOS - check if the distortion occurs while in BIOS as well.
Also, please click my DELL-username and write me a private conversation with the service tag and your contact details(Name and Email) for case records.
Let us know if you have any other queries.