My iPad won't turn on?

Hi!!

2017 model iPad, it won't turn on or charge.. I have put the iPad on a 24 hour charge, I have taken it off charge and then left it for a while, I have done hard reset (6-10 times) on chargeing iPad then left it an hour and then did a hard reset off charge, I have taped it on the back… I have changed the cables and plugs even socket, I have cleaned the inside of the charger bit… I need help, I am taking it to a shop on Monday fingers crossed, I just want to know any more tips?