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Turns out, if the terminal block screws aren't fully tightened, they don't electrically connect to the system. So even though there may be 12 volts going where it should, one would not see it by putting multimeter probes on the screws of the terminal block. Of course, when the board is installed ...

Well, I checked the terminals of the fan output with my multimeter and it read ~60 mV both on and off. The other terminals also read close to zero when the fan was set to 100%. As I mentioned in the post, I then turned on the hot end and read ~12 V off my meter, so whatever the problem is, I think ...

The fuses on the RAMBO are all still good. Interestingly, the red LED still goes on and off when I turn the fan on and off, so it would seem that the signal is getting there, it's just not switching.

I have a Max V1 which I purchased back in late February. I moved into a new apartment at the beginning of this month and finally got around to using my printer again, but I couldn't get the layer fan to spin. I turned it on from the LCD and went poking around with a multimeter and found that the ...