On older machines, the time & kill necessary to track down the problem may not be worth it, when the cost of the entire board is $80.
If you choose to replace the board, you’ll be paying for the whole thing even if only one component is causing the problem. If you have the time to hunt down a board & figure out how to install it, and the board is reasonably priced for your year/model, this is a viable option. This makes sense on older machines when they are available cheaply.
