Absolutely no problems until I move the computer into a new home. First time I started up I got the normal chime and everything was spinning as usual, but the screen was dark and said no signal. After multiple restarts. I got The Apple logo, but the progress bar was red and the screen was very blurry With hundreds of lines in different colors. It flashes on and off from blank screen to extremely blurry lined image. Could I have damaged the cable or the viewsonic Monitor itself, or just so happen to video card gone bad.