hello itis cummon on this car coil or spark plugs wire goes bad try removing a cable by a cable from the coill and iff any spark will come out if all 4 of them sparks that means your spark plug cable has gone bad

hello as i owner of this phone i have dealt with the same problem if i press the power button nothing happens i can still unlocked with my fingerprints it will unlock. If your phone is power off and you want to turn it on get your laptop,pc,mac and press the volume up and down button and plug it in the pc when it turns on press the volume down button it will restart and herre you are fixed i hope i have helped you and thank you and thi problem is caused by watter getting in the power button it happens