Please forgive me if I am posting this in the incorrect forum, and if I am, could you be so kind and point me in the correct direction? I work for a Engineering Manufacturing company located in California, we are contracted with various military, medical, mining companies and we have ran into a issue with one of our products. We have designed a USB (Game or Cursor) or Bus and Digital Interface Multi-Channel Programmable Signal Conditioning and System Interface Electronics. It is used in a mouse that controls heavy mining equipment under ground, the operating Voltage Range is 2.0V to 5.5V, a lot of these mice are coming back to us for repair (They are not cheap $2,000+ per one, and replacing them under warranty gets costly, hence my question). We are afraid that whoever is connecting the mouse to the mining equipment is operating it over the maximum of 5.5V range. My question: Is is there a way to check if in fact the the Voltage was exceeded its maximum range? Any help would be much appreciated.