I have a Toshiba Satellite laptop 1805-S274 which I "inherited" from my husband when he upgraded. Everytime I start it up, my screen goes black- can't see the screen or the mouse curser. If I push the button on the top right that signals I'm closing the computer before it is off (sorry, I don't know all the terms), it will flash back on for a second then black again. This goes on until I'm on the net for a few minutes. After I get it back to full color (I have to lightly tap the plastic frame around the screen a few times), all it does is flicker every few seconds but stays lit- like a bulb that is trying to go out. What is going on? Is this a case of light that won't stay lit? I can make out what screen it is on when it goes black, but In can't see the curser at all and it is way too dark to navigate the screen. It doesn't matter if I log off or turn the computer fully off- it happens whenever there is a long break in the action on the screen. Thanks for your help. in advance.