My phone work but screen is black My phone open normally and it works , but the screen is black!

My phone is galaxy j3 with OP 5.1.1 , Help please ! :(
Possible reasons:

1.) Your phone might be in a hanged state. Try a &quot;adb reboot&quot; command by attaching your device to your computer, however, you need to have developer options enabled or else it wouldn't work.
2.) LCD digitizer (a hardware module responsible for rendering Android's UI) is gone (short-circuited). You need to get it replaced.
3.) Do a hard-reboot (into any mode: recovery, bootloader/fastboot/any-other-samsung-proprietary-alternative-mode).

If you have tried every possible way to make your display come back, clearly the digitizer is short-circuited. Get it replaced (warranty covers that for free*)
* - Conditions applied.