Im using this car for a school science fest. The car was working fine just yesterday. We were doing a test run this morning, when we realized that its messed up.The battery-pack is fine because we checked it with a multimeter. There are no snags in the wire. We opened the transmitter and noticed there was minor rust on some components on the IC. Its critical that we get it up and moving because the fest is just 4 days away and my neck is on the line.