Laptop

hi can you see well enough to get on to the contol pannel ?
if yes go to your display or apperance and personalization then go to screen saver this is were you can find change your power option in that you can find the option to change your screens brightness if your on xp or vista these are worded differently but will get you there the same way jus look around if you can for it when you change your settings click apply for it to take efect .
if this dose not work then a complet sys fix maybe in order but try this first ok good look thanks