same thing happened to me like a month ago, so i decide to open the tablet an unsolder just one battery cable from the logic board and soldering back, turn it on and i worked i believe this happen because i rooted and installed greenefy and another program for control the battery usage, this kind of program can mess whit the screen not turn on from the sleep o standby mode, so i decide to flash back the android and never try to install programs to extended the battery life and i don’t have a problem since
Sorry for any mistakes but english is not my first language