My Dell Inspiron 600 will not turn on

Hello,
I have had this Dell Inspiron 600 for about 4 years! Yesterday i used it in the morning turned if off and later when i went to use it it wouldn't turn on!! I thought it was the power so i plugged it in and trying to turn it on and i has done the following, i pree the power botton and the green pwer light comes on with the green cap bottom it blinks for 10second and then shuts right off!! can anyone please help me i have very important photo i would like to get off!!