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btt e3 rrf not power to extruder motor


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I bought an Ender 3 V2 3D printer, and it came with several upgrades, including the E3 RRF board upgrade. However, since it's a second-hand printer, I've encountered several issues. Unfortunately, it did not come with a touchscreen. I've managed to address all the problems except for the extruder. There appears to be no power reaching the motor from the motherboard, and I've checked all the cabling. I'm unable to identify the root of the problem. I've also tested the motor, and it is functional.

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