My Macbook pro has no backlight (you can see a dim image). I checked the backlight fuse on the logic board and it's burned out. I heard Apple recommends replacing both logic board and display to fix this issue, as the display be shorting out the logic board (so if I replace the logic board alone, the new logic board may get shorted out and damaged by the display again).
This way I may just replace the logic board without having to replace the display if it’s healthy.
How would one check the display pins for a short-circuit?
Best Answer
You don't know that this is the issue. What you do know is that you have no backlight.
That's hearsay and not necessarily your diagnosis. Research is fine, but you need actual troubleshooting for a positive diagnosis. You wouldn't be pleased if your doctor gave you a terminal disease diagnosis if he/she didn't do anything but tell you "they heard from the AMA that...."
Just to give you a broad overview of what your looking for, there's no one diagnosis for a failed backlight. It could be
Each has their own diagnostic procedure like
To get an idea of this actual repair, take a look at this YouTube video. In the end, if this seems outside your wheelhouse, he's a good person to send your board to (not affiliated, just a happy customer).