I am running an Ender 3 Pro.
Prints started to fail and I noticed that the fan that cools the hot end (extruder part) was not running.
I bought a new fan. I cut off the old fan and tested it on a 24v battery. It worked.
A voltmeter on the supply wires from the main board showed just a few millivolts.
So I suspect the main board has failed.
Before I go buy a new one, I would appreciate the view of experienced 3D print experts.
Does my diagnosis make sense? Do boards fail in that way? Just seems odd to me.
General discussion on 3D hardware from beginner to expert.
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