I have recently experimented flickering in my screen. I purchased this laptop like a month ago.
Acording to some answers in here http://en.community.dell.com/support-forums/laptop/f/3518/t/19590879?pi41097=1 , One recommendation is to turn off the Dell extended battery life. But on Windows10 I do not have that option...What i see is Dell Power Manager Lite.
It looks like on direct AC and battery fully charged I do not present the flickering. If I unplugged the AC cable and battery goes lower than 85% I start seeing the annoying flickering.
I took it to warranty on my local's store and they were able to reproduce my problem. They told me that they will format (reset to fabric) the hard-drive to check if it was something physical or just software.
After format, they ran same tests and the flickering was not showing anymore. It might cause the flickering the Win10 addon called Hyper-V (for virtual machines).