Let me begin by apologizing if cpu is the wrong category. Ok so my PC was cleaned with DBAN. So what next. The monitor doesn't get the signal with the vga cable for some reason. The computer has a graphics card inside with 2 DVI connections that stick out the back of the PC. One of these picks up a signal with the DVI cable but its just a bunch of random color squares. I would think you need to install something for dvi to even work. Any help will be much appreciated.