Hi there im new to this area and I cant my LCD to work I tried everything accept Flashing the Firmware I saw every YouTube Video that you have edit "Merlin" I am way to Scared to Flash it the problem is the text doesn't show and the Screen backlight work only if I plug it in the Main Board. My video: The printer:He3D-A300 3D Printer Kit Package Reprapby jack001214 - Printing