First, the kind of question that you sent to me could be simply posted in the thread that you have started -- assuming that you are comfortable doing that -- you would probably get more ideas than from more people that way. But it is your choice.
As for your question, I am not clear on what happened?
(1) Did you buy this set new or used?
(2) Did you mean that you ran the loco successfully 3 times, then it stopped working? Or did you mean that you tried running it 3 times, and it never ran?
(3) Do you have any other locos? Do they run on the same track?
(4) Do you have a multimeter? If not, get one. It is one of the necessary tools for troubleshooting model railroads. You can use the multimeter to measure the track voltage and make sure that voltage is getting to the tracks.
MTRR75. I have a Bachmann ez track train set. The set is Ringling bros. The 0-6-0 steam locomotive does not run. I only ran it 3 times. It does not do any thing. Dead in the water. If you could help me trouble shoot/fix this train I would really appreciate it.