IPHONE X/S can only charge when phone is turned off
 

hi guys i bought a second hand iphone x/s but the problem im facing is that phone cannot charge when its turned on..i cant only charge oit whn i turn off the phone..
initially when i bought it i was able to charge when i insert cable and restart the phone but not i can only charge it when phone is completely turned off.


plz i need solution oh how to fix it.