i'm seeing the same thing. i've had the computer for four or five months and this only started recently.

Hi,

 

Mine's about two and half months.

 

knafaym

Mine just started a week ago also. This is most likely caused by the video driver software. My old Vaio had the same problem and was solved by installing an updated video driver. I have not had time to check with the intel website to see if they have an updated driver. I did not see anything on the dell website last week. I would guess one of the windows updates that you may have auto installed caused it. I think that is my problem. I had two updates autoinstalled recently (that prompted me to restart). I will post more later after I update my video drivers.

Updated drivers seemed to do the trick for me. No more flashes. I used the drivers from the Intel website.

i also reinstalled the drivers from dell and have seen no flashes since... :)