toshiba satellite P30-100 running windows pro XP. had screen show a flickering mainly white ( now all white) bar approx 1/3rd in from left of screen. I assumed it was a screen fault but it did disappear on one session of use.( after being left off for few hours) it has now returned to stay! when booting up the screen show full black and powering up images as normal until it gets to start to display windows screen page then it shows a white vertical bar approx 35 mm wide down screen which covers command and menu bars. The cursor also disappears under? this but will still operate on anything under it I cannot see such as a 'button' or link. I would appreciate any help. having looked up this problem online it seem I have 3 areas to look at but 1st one is for me not valid ( as I had screen working and still does fully on booting up).
1= faulty LCD screen .2= faulty video chip,3= faulty wiring connection and 4= corrupted video drivers.
Toshiba problem page not much help. thanks fo any responses in advance.