Got new tv, plugged in when the van was in the drive at hone on ehu and worked with 12v perfectly. Now away in van off ehu, plugged in to 12v and aerial and it will not turn on, I have made sure the two on buttons on the tv are on and have tried in another 12 v socket and it will not turn on. I may have left it on standby when I packed it away at home because we had not fitted it to the bracket so am wondering if I have inadvertently drained a battery in the tv. Can’t phone avtex until tomorrow any ideas please