DELL T5500 CHIPSET HEATSINK INSTALLATION 

Do I need to remove old thermopaste and set new one?

Hi my friend I have issue for my pc t5500 if I click power button to start it be orange light and 1. 2 blink every time i try it dont start i checked the cpu .Ram . Graphic card . Every thing I don't luck can you help me . Such as this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ZISzIk0vKZY.html