tmc5160 stepper issues

Recently I had both my x and y 5160 steppers die now I'm back running the 5160's @48v again but on my 3rd print I get the error shown below same as last time. Cant power up the motors . Unfortunately fan is off in fault state and when I arrived the stepper drivers were very hot!. Before I left I checked steppers were cold to touch, all looked well printing fine. She printed for the last week on 2209 @ 24v no issues. Now I can't keep throwing 5160s at this I've only 2 spare 😬. Any one any idea where to even start? I have a 200w 48v psu supplying the octopus Pro @50v. 2no. 50mm fans cooling both steppers. Any help appreciated ✌️