i just changed the PS and V+ and V- at 48V and all cables at the same connectors.
When i turn it on, you can hear the click inside, the lamp off the meanwell 48V 960 watt are green, but the board are dark. No red, yellow or green light.
When you put USB inside, you don’t get a connection. I testet 3 USB cables, but nothing happens.
Here are all photos, i have: https://photos.app.goo.gl/iWM6Cpvq46XwM7Bu6