I’ve got an ender 3 that the display won’t come on when the machine is powered on. Seems like nothing has any power, except for fans maybe. If I plug a micro USB in it, the display comes on. The touch sensor lights up, the filament sensor, and everything else it appears. But, it won’t do anything! I’ve tested everything, and I can’t find 5v anywhere! It has 24v even going to the display! I thought that the board about had to be the issue, because my power supply is only supposed to put 24v out, and bought a second hand board… Got it in, and exactly the same!! What can the problem be!! What are the chances the board I bought also has the same problem?? Any ideas please!!! I need this printer working!! Thanks in advance!!