Troubles with the displays

Hi,i've got both 600/700 both 800/900; before i was planning a flight but the displays in the cockpit were all dark but the battery were switched on; i couldn't turn on the APU (even if i pushed on the switch, nothing happened) and the ground power; than if i switched on the lights, only tha left half of the overhead panel lit...the other half stayed dark...; so i try to uninstall it(with the removal tool) e to reinstall it(with all the patches) and i reinstalled also the video card's drivers, but nothing changes; this happen with every version on 737NG...Can someone help me?Thanks.Bye!