I have an IBM 390E Thinkpad and just finshed replacing the bottem casing because it had cracked in various places(mainly where it holds the screen). I put it all back together and turned it on and all the lights flash, i can hear the HD and the fan and then the harddrive light goes solid but the rest flash and go out. the only way to get the HD light to go away is to remove power complely. Does anyone know what this means?