Apart from Android screen at start up only able to access P/W screen so unable to move on. Tried holding down the start button for 20 secs. Screen just goes blank after about 10 secs. Any ideas would be appreciated.Welcome to the forum
If your tablet was connected to WiFi when you attempted to input your password, at some point it should ask for your Google user name and password. If that doesn't happen the only other option I know is a factory reset.