If you NEED to return that exact PC then it would be better to just find a new fan for that socket which might cost anywhere from 10-120 bucks. However, seeing as that pc is nearly 11 years old, it might be easier to get a slightly newer one of a similar tier for a slightly higher price.

Unless you have to, I wouldn't recommend it. Not to mention that it wouldn't be particularly more expensive to buy a used MacBookPro 2015. There are more that could go wrong than would make it worth it.

My advice would be to check the buttons and make sure they aren't clogged. Both on the back of the tv and on your remote.