Lenovo TB-8504X issue

I tried to install Ubuntu touch on Lenovo TB-8504X, which was very slow on Android so I thought of changing it to Linux ( also I was to curious)

But when I find out that it's not supported I thought i would be able to install other Ubuntu touch for Lenovo tablet for this too and then idk trying to fix the necessary drivers, but as we can guess it lead to a dead device and whenever I turn it on shows the Lenovo's icon and nothing else. I cannot even turn it off.