hi guys not sure if right section , if not feel free to move to correct , here goes just replaced battery and screen on samsung galaxy tab 3 10.1 ( gt-p5210 ) , after booting up all is working fine so onv all cables in correct , the problem i have is that the home screen time does not change , for example if i use it from 9.20 for 10 mins it will still say 9.20 , if i let it go into standby , then press the home button so the lock screen comes up the time is right on that , so swipe to open , the home time screen says the same , then the same prob it wont change , have been into setting , time and date , there is no automatic time function , grateful if anyone knows how can get the screen clock to work properly , thanks in advance