If you contract Traxxas, they will tell you to go to their site, register your truck, and go through a process to open a work order. Then it's 50 bucks, plus shipping to Traxxas to refurbish it.

I would try going through the setup on the ESC since it only takes a few moments and it's free.

Also, if you think your Transmitter or reciever are to blame, there are quite a few budget friendly upgrades for an early Emaxx.