This could go to electronics, but as the control board is rather specific to Tronxy X5S, I'll as in here.
My heatbed seems to have infinite power and zero resistance and that burned the driver FET from Tronxy S5s control board.
My board has so tight thermal glue that I can't peel the heat sink off to see which FET they are used.
Does anyone know what part is used in these boards?