If you have a good friend nearby with a vga card, ask to borrow it for a few minutes [ask nicely mind]
Try the same stuff as above [one stick at a time].
If that comes up with the same results, then [where did you get the RAM?] try the RAM in someone else's rig.
If the sticks, or one of them at least [looking above] is fine, then the mobo must be executed. [Less likely to be the cpu]