Hello,
I have a fairly new (4 months old) XPS15 L521X purchased in July this year. It came pre-loaded with Windows 8 which took all of 1 hour to get sick of, so I reformatted and loaded up Windows 7 64bit.
Unfortunately I went away on hoildays shortly after and it sat in a box for a couple of months before I have had a chance to pick it up recently. I have noticed that images on websites all have a 'dithered' type colour effect which is most noticeable in green colours.
I didn't use the unit for long enough before the reformat to notice whether or not this was present in the Windows 8 load. I have tried updating all drivers and still can't seem to get rid of this problem.
Are there any suggestions on how I might be able to troubleshoot this further?