It can be as little as the monitor cable connection to the motherboard or a problem in the cable where it runs through the monitor hinge.
Thanks for the replay thats what I was thinking, I was going to replace the monitor cable and inverter since both parts can be acquired for about $15. If that does not solve the problem I am guessing it is either the LCD or the graphics card, which is build into the motherboard.
If it is the inverter, cable, or lcd when I connect it to an external monitor I should not have this problem on the external monitor right????