my toshiba satellite M55-S3291 has a error on booting. in most cases (about 2 out 3), the LCD will light up but not display any boot info (backlight is on). however, when i connect an external monitor and activate it by the Fn+F5 key set, it will show windows booting and running just as usual. sometimes, though, usually on one out of three boots, the LCD comes on as usual and works fine till the next reboot. drivers are up to date, I did a windows recovery to a date when I know the problem was not existent, did a virus check and so forth. Toshiba does not know what is wrong so here we go... any suggestions?