I have the exactly same problem for my teclast x98 pro.. There was no problem with my tablet then, I turned it on ( it had 50% charge) but it do anything… I pressed the buttons long time many times nothing changed. Then I charged it many times but nothing changed…
Every time I plug to charge it shows green battery sign and then go off… Do you have a solution? I dont want to throw it away… I should have never buy teclast…