dark? or blank?
if it's blank, you have the "battery save" option enabled.
if it's just too dark to be readable, hold it so that the light directly shines into the display. or maybe your model has a different screen than mine and that doesn't work.
dfx you are right i had the battery save enabled thank you now i can see the screen it is dark but i can see it especially in sunlight batteries should be just fine.now if it will just cool down hot in georgia