I found the same problem and I think I bunked the wifi box in the process. I had the wifi box on without the printer on and it was doing the same thing and then just stopped working. I got a second wifi box and use a switch to turn both on a the same time or you could use a power bar. Not ideal. Will try the cut the +5 Volt lead on the usb cable. I'm guessing without looking at the link below that you have to hack a cable and reconnect wires...I don't want to that crap lol. I can. But I shouldn't have to hack a cable. Creality should know better as a manufacturer to investigate this or put in electronics to prevent feedback. It happened to me and yourself so its not a new thing. Any updates on this would be appreciated. I really don't want to buy more junk to hack junk to get junk to work. It should just work.