Sermoon D1 Y axis cabling fault
After around 30h of work, my Sermoon D1 failed on Y axis. As initially guessed, the poor cabling harness of Y motor resulted that cable and connector were forced to bend on every move.
I further investigated that problem and realized that Creality/factory mounted that cable in a wrong way: It looks like it was foreseen that the cable has to be tied by two cable ties - but they only used one.
I checked three printers from two different countries - every one had this mounting issue. So I guess your printer will be affected, too.
To fix that, just add another cable tie - see pictures below: