@Confessor said in Dead Duet3 Board?:
How would I go about hooking up the mosfets for the bed? Anyone already have a thread about it?
Have a look at this for an overview.
https://www.youtube.com/watch?v=uBOLE_hituk&ab_channel=DIY3DTECH.com
and here: https://3dprint.wiki/reprap/electronics/heatbed_mosfet
Also take a look at the anycubic documentation (I assume there must be some) since they include a mosfet on some of their printers.