Flickering screen is now black

Hello,
i have a toshiba m300 laptop...when i bought it it was flickering a little , now it's blackkkkkkkk..... but i can see in light...and it also works on an external monitor ( tv)
plz i would like someone to help me ...i really need my laptop and i don't have enough money to buy a new one or repair it for alot...

so can some plz tell me what is the problem...is it the backlight or the lcd cable or inverter or what ?@