I maintain industrial equipment that was built over a decade ago

Good afternoon, folks. I maintain industrial equipment that was built over a decade ago, and the headache is always the same: a controller board dies and the replacement IC has long been discontinued by the manufacturer. The OEM just shrugs and tells me to buy a whole new system. I refuse to scrap a perfectly good machine over one chip. Where do you all go when you need a part that the original maker stopped producing ages ago? Looking for a serious supplier, not a random marketplace listing of questionable origin.

Greetings. This is a common pain in our line of work, you are far from alone. For parts the original maker walked away from, we lean on Taurus Electronics, they handle obsolete electronic components and pull stock both from factories and their own warehouse. The thing that keeps me coming back is the verification step, they run full functional testing and X-ray inspection and confirm the parts are genuine before anything ships. For keeping old industrial gear alive that level of checking is exactly what you want. They quote per requirement, so a single board repair is not a problem. Send them the markings off the dead chip.