Mother boards change over time. Newer, faster, smaller components become available, so they are incorporated in the new boards in the new machines. Making the old models of boards is not profitable, as there is not much demand for older models. So, they quit making them.
Some of the older boards can be repaired by electronics technicians. The newer boards are not repairable, as they are produced in vacuums or some other technique that is not available to repair technicians.
If you would like to find someone who can repair a board, call an independent computer repair shop. They might be able to help you find someone who can repair the board if it's an older board.
This is the way I understand it. I'm not an expert in computer board repair.
By the way, you cannot find a new mother board for an Apple Imac anymore, either. It's all a matter of time. If it was a fairly new sewing machine, you could get a new board for it.
bkay
Last edited by bkay; 11-26-2017 at 07:29 PM.