My iPad Pro 10.5 inch 2017 does not update, i am stuck on ipados 14. I try to update, it downloads does all that stuff, then when it goes to restart it flashes red for a split second then boots me back home, I want to sell this. It has a lightly cracked screen just a hairline fracture across the length of the device and some dead pixels other than that it works great. has anyone had this issue? if so whats the fix? I have heard some say to like fix the flash storage or something like that but i dont know exactly, i have limited to no soldering experience.