How to destroy your Bigtreetech Boards

Needless to say, doing anything described here will invalidate your warranty! But if you have discovered a hobby that is even more enthralling than 3D printing, and you really want to say goodbye to your 3D printer and all its component parts, read on. 

1. Short +3.3V to +12V or +24V. Achieving this accidentally can be tricky. However, if you're using a 3.3V Z probe like the mini IR sensor, you already have a 3.3V power wire going to the hot end. You could 'accidentally' mis-wire your hot end by swapping a heater or fan wire with the 3.3V supply to the Z probe. This would feed 12V or 24V into the 3.3V power rail.
2. Short +5V to +12V or +24V. Achieving this accidentally can be tricky. However, if you're using a 5V Z probe like the bl touch, you already have a 3.3V power wire going to the hot end. You could 'accidentally' mis-wire your hot end by swapping a heater or fan wire with the 3.3V supply to the Z probe. This would feed 12V or 24V into the 3.3V power rail.
3. Disconnect stepper motors when VIN power is applied and the motors have been powered up. If you do this a very many times, you might possibly destroy the stepper motor driver chip, although the TMC2209 drivers are quite tough and I failed to destroy any drivers when I last tried this, even using 24V VIN and motor currents set to 2.4A. You could be a little more subtle by having a bad crimp connection in your stepper motor cable instead of blatantly disconnecting motors while they are under power. But you will need to do this on all 5 stepper driver outputs if you want to destroy all the drivers.
4. Reverse the VIN power connections. Preferably, use an old-fashioned unregulated power supply - basically just a transformer, bridge rectifier and smoothing capacitor - without any form of current limiting. That should guarantee that you at least fry all the stepper drivers. Don't be tempted to do this using a modern switching power supply, because these generally have foldback current limiting - the lower the output voltage, the more the current is limited - so the current may be too low to fry the drivers. Remember, there are 5 drivers connected across the VIN supply, which will share the current.
5. Create a short between a hot end thermistor connection and an extruder heater or fan connection. 
6. Create a short between your bed heater thermistor and your 12V or 24V bed heater.
7. Short the endstop supply voltage pin to ground.