touchscreen non responsive

[Android Question]

galaxy ace Gt 5830,phone turns on,cannot slide lock open,press the power button to get switch off option again nothing when I touch the screen..have put in new screen and lcd screen but again nothing..it was working fine before this happened..any ideas?

 

[Rukbat]

If you verified the new screen before you put it in (to make sure you didn't get a bad screen), my guess would be the motherboard.