Hello, I have a friends A1370 MBA with a backlight blown fuse issue. Without me touching the fuse, everything works and displays on an external monitor no problems. I changed the fuse yesterday, but that didn't solve the problem. The external display showed the apple logo with the loader bar underneath it. when the bar got to half way loading the fan started spinning very fast and the eventually blew the fuse again. I'm not sure if this was coincident. I took some measurement before the fuse blew again: fuse 8v 3&4 of J9000 = 0v Q9706 Pin 3&4 = 8v , Pin 1,2,5,6 = 0v I'm not sure what to check next, any help would be appreciated.