Before continuing on to the troubleshooting, please change the batteries on all timers. The batteries last a long time, so it is very easy to forget that eventually they will run out.

 Troubleshoot an event that uses:

One Gate
Two Gates

Other Issues

Works for a while then quits working
Testing gates in my kitchen and they don't seem to work
app shows “no signal”
app shows red X or a gray box has a red light
app shows “looking for gate”
time does not stop when crossing the finish gate
sometimes it fails to detect a gate crossing
Random Start or Stops