Salvador Barajas, "screen turns off and nothing but computer freezes" sounds like an overheating issue. I would disassemble the computer and clean the fan, reseat the CPU and apply new thermal paste. Download the service manual from [http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/39t6192_01.pdf|here.] Make sure that the air inlets are cleaned and the you have good airflow. After that, re-evaluate and see what you get. Hope this helps, good luck.