Toshiba C855 split Screen while installing

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http://forums.fedoraforum.org – I'm trying to install Fedora 16, 64 bit, on a Toshiba Satellite C855-S5206. Single hard drive, 8GB RAM. I did have Ubuntu 12.1 running on it, but I don't like its interface much. No other installed OS. In the install sequence of windows (screens) the screen appears left/right split. In that the right side of the screen is to the left of what should be the left edge. I have to run the mouse over the right edge and back across the left edge of the screen to get the NEXT boxes, and then back left to back to the next selection. It stays this way after install and reboots. Setting the scr (HowTos)