Based on one experience with having to buy a new circuit board for a sewing machine, I think you made a good decision. I had to replace the main circuit board in a machine that was only 3 months old. Don't know what caused it, but - knock on wood - it's been fine since then, now 5 years later. It was under warranty, or I would have given it up immediately because without warranty coverage, that repair would have cost more than I paid for the machine. I routinely unplug my computerized machines whenever I'm not using them and anytime there's a thunderstorm nearby. I don't know if a power surge was a likely cause, but that could have had a similar effect on anything with circuit boards, of any age. I hope you get a fair return on your investment.