Our oldest Industrial pc construction, that still can be delivered, is over 20 years old and for marine usage - the mechanics are the same but all the electronics have been switched, several times even.
When the earth quake and the following tsunami washed over Japan in the winter of 2011, it had big consequences for the availability of certain electronic components. Among other things the 10" LCD-display one of our medico customers uses, could suddenly not be delivered anymore.
So now we were suddenly in a hurry, because we had to find a replacement screen that was still produced and with capacity to meet our needs. But not only that, we also had to bring home samples, so we could build a new prototype with the necessary changes to run with the new screen. It turned out that we had to change the mechanics, inverter and LVDS prints.