Chosen Solution
So I came across this MacBook from a friend and originally it had a cracked screen. The backlight worked at this time. Well she was given a free screen swapped it over and the backlight doesn’t work ( could be why it was free) well I have done research and seen about the fuse I took the back off powered it up and I have 10v across the fuse when on and I can see items on the screen with a light shined on it. Anything else I should check before ordering a new screen? Thanks!
michael johnson most often it is the backlight circuitry on the logic board that shortens out. you computer does not have an inverter cable per se and the LCD is most often not affected. If you want to replace a part, I’d go with the logic board, but check your old one first. Clean it appropriately with isopropyl alcohol and check the fuse and other components, for any damage. Check your display cable connector and make sure it is seated properly and check for damage on it as well. Fuse and LED driver location marked. The driver is a APP001A and that of course means it is Apple proprietary so no data sheets available. It might also be impossible to get a replacement. You’ll have to find some information about Apples LED driver and see if there is a compatible one from TI for example.
It means the backlight burned out. You can choose to replace the backlight on its own, but this repair is risky and very difficult since the LCD and backlight are fused together. Additionally, there are mercury components. Replace the MacBook Pro 13" Unibody (Early 2011-Late 2011) Display Assembly.
