Brother Se400 Computerized Embroidery & Sewing Machine "help laptop screen lighting" Questions

laptop to my machine when the lcd screen went blank now it only lights up the lcd and i have tried connecting it again to my laptop but my laptop can't find it either so i am really at a loss read all

...laptop and then open the USB manager. When it opens it will show a light blue screen and grey icons to the left. Click in "disk", then click on "read disk" and you should be able to see your designs. ...