no longer able to control fan speed through PWM on d9
Recently had a slight mishap with my custom AC part fan mount, resulting in ripped off wires and a catastrophic short on the d9 MOSFET on my RAMPS 1.4plus. (house fire averted, thankfully) O_O
I designed a new fan mount and rewired the fan to eliminate any possibility of that happening again and my printer's back up and running. BUT. now I have no control over the fan speed. Nothing I've tried can even turn it off - I might as well plug it in to the fan 2 pins instead of d9.
Google and reprap forums suggest a fried MOSFET pin which, given my observations, I'm inclined to agree with. Beyond that I have no clue how to fix it. I have some soldering experience and I'm willing to try to replace/repair but would be very grateful if anyone could step me through exactly what I need to do to get PWM back for my part fan. Or point to any helpful resources.