I haven't seen an easily serviceable lenovo product in years. The last 3 lenovo laptops I've had to fix had their keyboard plastic rivited to the case, so you'd need to completely disassemble the whole thing, and get a new case if the keyboard died. One of their new thinkpads went through two motherboards before it was stable.
Their new all-in-one's require you to remove the entire backhalf to upgrade the ram, which is basically impossible to do without damaging the screen since they don't have any structure supporting the screen besides the case, and it's just plastic snapped together.
I'd highly suggest never getting any lenovo product