USB flashing for me actually has worked out nicely, my tablet was dead for roughly 3 months and now its working like new again! It took me just a few minutes to set everything up but it was pretty easy, as long as you set it up with the right chip and find the right bios then its super easy. just remember that your tablet will probably be super dead and will take a few minutes for the charge to stick and it shouldn’t have any issues after that.