Chosen Solution
Had to replace screen due to damage. New screen comes on but there is no backlight (I can see logo etc. using a flashlight). I have confirmed its not a screen issue by swapping in a known good screen to confirm. Trying to find info on location of fuses, backlight circuitry etc. for this model (A2289) but coming up dry. Any help locating info would be much appreciated. Thermal scan hotter area:
Paul Jackson besides the excellent answer given by @hellomacos consider this just an addendum, The backlight fuse is reference designator F8400 and it is a 3A 32V fuse in a 0603 package
For some really helpful information about how the boost circuit on this model is driven etc. check on here
Hi Iv had this happen to me with screens and it caught me by surprise! It’s probably not a issue with the device it self as like you said the old screen didn’t have this issue So here’s what I would check! Check that the connector doesn’t have any black or burned pins on the connector as this can cause the issue CAREFULLY check the ribbon cables for any debris or exposed copper or tears and this can cause no backlight Finally I would try cleaning the connectors on both the screen and the device while it’s off with a high percentage of isopropyl alcohol as this can remove microscopic dirt that our human eyes can see! If none of these work don’t loose hope and shoot us another message and we will try some other stuff! Hopefully this helps though Thanks:-)