I just had a power blackout a few minutes ago and my computer shut off. I turn my computer back on when the citie's power comes back on, and my screen has a lot of white squares that keep flashing. Then the monitor goes black and I get a message saying that the frequency is too high. The message is from the monitor, not the computer; I never even get into windows. Drivers are updated, RAM, LCD, CPU, PSU, GPU, HDD, and everything have been tested on a different setup, and they all work flawlessly. So are the visual artifacts due to a shorted MB?