@Phaedrux Sorry for the late reply, I just did, and all the same. I'm not an expert but I found it wierd too, I just ordered a new Duet wifi 2 hope this time I dont screw up, but I would still like to know what's going on as I could use it in other machine (That's the idea anyway).
I don't know if this gives any bell, but I believe it's important to notice that before it stoped working my E1 was always on as soon as I applied the 24V on VIN.
Even if that says nothing to you, thank you very much for the help!