More and more 'No user serviceable'parts inside ' rules today
Even more costly items going that way simply because the technology changes so rapidly stocking spares for repair is a no no
So bin it(or keep it to 'play with) and get the next one.
If cheap is what you go for, take a look at 'Morgan computers' website. Last weeks 'tech' at silly prices.
I've used them for many years for a sorts of electronic gizmo's