The plastic frame in front of the LCD screen is the Display Bezel.The screen Inverter is mounted at the bottom of the Screen Frame.[The LCD screen is an assembly of layers. There is a metal frame resembling a picture frame; which keeps these layers in the factory set alignment; the Screen Frame ]Therefore easy access. Just remove Display Bezel.To test a screen Inverter requires a sensitive multimeter; read fairly expensive,
http://www.fonerbooks.com/test.htmDue to the above, ease of access to replace, and generally low cost; the screen Inverter is just replaced.Then on to the Backlight if this doesn't repair the problem.Which brings me to this;Safety
https://www.laptopscreen.com/English/model/Toshiba/SATELLITE~A100/The Toshiba Satellite A100-S8111TD Notebook PC, uses a single CCFL for a Backlight.A CCFL is a Cold Cathode Fluorescent Lamp. (Bulb)Similar to it's larger 'cousins' used in homes, and businesses; but on a MUCH smaller scale.Average thickness is 2mm. That is a little larger than 1/16th of an Inch.Average length is almost as long, as the LCD screen is in height.View the last 8 photos,
http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/This means it is Highly breakable. Costs more in money to just replace the entire LCD screen, (Which has the Backlight built-in),but cheaper when you compare to life, and limb.Jus sayin'.
http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/remove-replace-LCD-screen-1.htmFor additional questions please post in a Comment.Regards,joecoolvette