Half-green monitor--Quad core i7 Mac Mini

Yesterday when I was working on a film project, I noticed that half of my monitor flickered and then tinted green (I have a Dell S2340M). I decided to just wait and see what happens, but for some reason it wouldn't go away. I then tried to use a TB to dvi adapter and nothing changed. Finally, I plugged in my macbook pro (mini display to DVI) and there was nothing wrong. When I plugged in my mini again, it was fine. Around 20 mins later, I started to play a very low graphic game and it came back. What is up? I called some IT hotline and they told me to look at my diagnostics. I got this:

6/6/13 10:57:29.456 AM WindowServer[87]: Display 0x2b342fd6: MappedDisplay Unit 2; ColorProfile { 2, "DELL S2340M"}; TransferFormula (1.000000, 1.000000, 1.000000)

6/6/13 10:57:30.631 AM WindowServer[87]: Display 0x2b342fd6: MappedDisplay Unit 2; ColorProfile { 2, "DELL S2340M"}; TransferFormula (1.000000, 1.000000, 1.000000)

6/6/13 10:57:30.645 AM WindowServer[87]: Display 0x2b342fd6: MappedDisplay Unit 2; ColorProfile { 2, "DELL S2340M"}; TransferFormula (1.000000, 1.000000, 1.000000)

6/6/13 10:57:35.623 AM WindowServer[87]: Display 0x2b342fd6: MappedDisplay Unit 2; ColorProfile { 2, "DELL S2340M"}; TransferFormula (1.000000, 1.000000, 1.000000)

CGSGetDisplayAliasList: Invalid display 0x2b342fd4

Anybody know anything I don't? IT said that I might have an infection. I don't know if I belive that though. ALSO: I tried to download the EFI 1.7 made by Apple and there was no download. I found it from a third party and I got a message saying "incompatible hardware".

Additional Notes:

I just bought this computer 4 weeks ago brand new.

I upgraded the RAM to 8GB myself and I have gotten a white screen and had to hard restart and reinstall the RAM twice.

Hardware: Apple Keyboard, Razer Deathadder mouse, DELL S2340M monitor, 3 TB western digital external drive, 1TB HDD (Internal)

Any help is appreciated.