A replacement backlight is available on eBay for about $75. I remember when those machines came out they were hugely expensive, now just a few hundred will buy one. If you don't use the embroidery part, or the decorative stitches and you have other machines, it doesn't seem worth it to fix it. If you do use the decorative stitches or you want to expand into embroidery (maybe to make labels for your quilts) it wouldn't hurt to get an estimate.