I just hooked up my new MAX31855 board to Arduino Uno. I started the serialthermocouple.pde sketch with the T/C disconnected. I saw the message "Something wrong with thermocouple" message on the serial monitor. I disconnected power and attached the T/C and restarted the sketch. Now I saw that both internal temp and temp C were = 0. I disconnected the T/C and the temps were still = 0.
I'm afraid that in futzing with the T/C connection I may have burnt out the input. Is it that sensitive to making connections when powered (if I inadvertently did that)?