These are some common tools used to work on this device. You might not need every tool for every procedure.
Track down a number of hardware and software problems using the TomTom ONE Troubleshooting Guide
The TomTom ONE is a easy to use GPS device that is made for use in automobiles. The TomTom ONE is the base model of the TomTom navigation systems and there are six different ONE models that include the 140, 140S, 10, 130S, 125, and the 125SE. This specific device is a second edition, 1GB unit