My Toshiba Satellite L50-C-22L screen is black on startup most of the time, the laptop is on, but the screen is black. Sometimes the screen does turn on, and often 10mins to a few hours later, it will just freeze and then go black or just go black again. The laptop is on but the screen goes black. Sometimes when the screen is on and I leave it on sleep, it goes black and other times (but much more rarely) when the screen is off and I leave it on sleep the screen turns on.
Ive tried taking out the battery and charger and holding the power button for 30 seconds, putting everything back in and then turning it on. This works once or twice, but then very soon the problem comes again.