The installation of the heatsink fan must be attached tightly to the cores of the CPU. Do not try to force Perhaps the core of the CPU may not fly. The pin fastener that secures the fan, maybe it's too hard.
The installation of the fan heatsink must be attached close to the core of the CPU. don't try pushing. Maybe คอร์ของ CPU may chipped. The leg part spring based on fan maybe it's too.