My iphone 4 screen went blank and wont turn on!

My iphone 4 just went blank today while i was texting, it had plenty of battery so it wasnt that, i have tried to reboot it by holding on lock button and home button but its just not working no matter how many times i try it! i have plugged it into my computer but itunes is not registering with the iphone, i downloaded the latest quicktime and itunes software thinkin that may be the issue but it hasnt worked either! i have googled and tried everything however i did read about restoring it but im worried that all my music/contacts/apps/photos will be gone. I have sync it several times however the last while i havent so some pictures and apps may be deleted is there any way to save these photos? can any1 please HELP ME?? 😟