I've done a few things in the 2 matches we sat this year.
- Look at any D/S logs for errors. Depending on how you're setup/configured, the errors may be gone by the time the robot makes it back to the pit - especially if COMMS comes back. This may provide crucial info to the pit crew in diagnosing the errors.
- "Reboot RoboRIO" sometimes works, but could take as long to come back as there is left in the match
- Bring up driver's station performance characteristics (taskmgr, custom stuff, etc)
- Use the time to specifically coach the HP on a new strategy/technique for rolling the balls
- Keep mashing buttons
- Tell the partners, discuss what to do next. Answer their questions about your robot "Can I push you?" etc.