Nasty if true, I have 18 atom C2550 touch screen PC's in use in client locations all are now about 18 months old and out of customer warranty but I am going to

Nasty if true, I have 18 atom C2550 touch screen PC's in use in client locations all are now about 18 months old and out of customer warranty but I am going to be in a bit of a moral dilemma if a processor fails prematurely due to this. Question is how would I even tell if the fault was down to a faulty CPU and what should my moral obligations be to clients considering I am unlikely to get replacement motherboards off the manufacturer?