Upon booting up my computer, my screen dims down. For example, when I boot up to my desktop, sometimes, my desktop display would be dimmed. A few seconds later, the screen would dim to the point that it'll appear as if nothing is displaying (if the monitor is looked at from eye level). However, upon closer inspection, I discovered that my monitor is displaying everything; however, I must look at the monitor at a certain angle to be able to see the icons. Could this be the result of a damaged PCI-E slot or a damaged video card?