Tennessee Code Title 2. Elections § 2-7-110

(a) The officer shall give the sealed voting machine keys to the judges to prepare the machines for voting. The envelope containing the keys may not be opened until the judges have examined it to see that it has not been opened and that the number registered on the protective counter and the number on the seal with which the machine is sealed correspond with the numbers written on the envelope containing the keys.

(b) If the envelope has been torn open, or if the numbers do not correspond, or if any other discrepancy is found, the judges shall immediately inform the voting machine technician of the facts. The voting machine technician or the technician's assistant shall promptly examine the machine and certify whether it is properly arranged.

(c) If the number on the seal and the protective counter are found to agree with the numbers on the envelope, the judges shall then open the door concealing the counters and carefully examine every counter to see that it registers zero (000) and shall also allow the watchers to examine them. The judges shall then sign a certificate showing the delivery of the keys in a sealed envelope, the number on the seal, the number registered on the protective counter, that all the counters are set at zero (000), and that the ballot labels are properly placed in the machine.

(d) If any counter is found not to register at zero (000) and if it is impracticable for the voting machine technician to arrive in time to adjust the counters before the time set for opening the polls, the judges shall immediately make a written statement of the designating letter and number, if any, of such counter, together with the number registered thereon, and shall sign and post the statement on the wall of the polling place where it shall remain throughout the election day. In filling out the tally sheets, they shall subtract such number from the number then registered on such counter.