First of all, opening the lid is risky, otherwise it will be scrapped; Secondly, the melting point of lead-free solder wire is about 2 17 degrees. Even if you melt it, it can't be soldered to the processor core. Solder wire cannot be soldered to the core material, and the thermal conductivity of the solder is not strong. Someone opens the lid, insulates the inside, and then pads it with imported liquid silicone grease. Just use solder or something