Display is black but still works

[Android Central Question]

I dropped my android phone (bluboo s8) on concrete the other day and it landed on my type-c to 3.5 mm female adapter. The phone works as it normally would (power button functional, sounds register, touchscreen registers on areas where it would react such as home button, etc.) however, the screen is black. I can see it light up when I turn it on but no other colours or anything comes up on screen. I’ve opened it up and checked a majority of the soldered points in the area which it was impacted by the drop but nothing seems off (even though I know very little about mobile hardware.) please help!

 

[Rukbat]

The screen or the motherboard (or maybe both) have to be replaced. If you cracked the LCD layer on the screen, you won't see anything, but if the screen driver (on the motherboard) cracked you won't either. The normal procedure for a good shop is to plug in a replacement screen to see if the screen needs replacement (which is why shops keep unrepairable phones around).