I had the ebay guy send me a replacement - I simply told him that when I plugged it in, all I got was an "E E E E" message.
As to the thermocouple, it's just a cheap thermister. Plopped a 10K 1/4watt resistor in there when I was sans probe, and it read 25 degrees. So not sure if it was a TB or a TK. (Don't ask how I know this, I just did what I was told!)