My laptop is Packard Bell Easynote TS11HR_517tk. It had an i5 2450M processor and it wasn't enough for me. So I wanted to replace it and bought an i7 2670QM processor instead. I searched, the socket was also compatible, the chipset was also compatible. I installed the processor, all functions of the computer are working without any problems, the fan etc. is spinning, but there is no image on the screen. What should I do?