Strange system problem

[Bill Becker]

We a very strange problem hit us in the elimination rounds at NYC. Our code and systems were working fine during all the qual matches and then in the elims, our robot appeared to continuously reset whenever the drive motors were run. This happened in autonomous and during operator control. The operator interface would report no data radio when the robot reset. It also did the same thing in the pits on the tether after we were eliminated.

After reading many of the posts in this forum, it seems like there are a few possibible problems, but I wanted to ask here because we won't have a lot of time to troubleshoot at nationals and it won't be much fun if we can't resolve it quickly. Our backup battery was pretty low on charge, but I wouldn't think that just driving the motors with the wheels free spinning on tether would cause voltage to go too low. Our programmer swears that he didn't change anything in the code. Could it be a faulty speed controller??? or could our controller been damaged? Any other possible causes?

Thanks!