These are some common tools used to work on this device. You might not need every tool for every procedure.
A1236 4GB, A1236 8GB
Track down a number of hardware problems using the iPod Nano 3rd Generation Troubleshooting Guide.
Identification and Background
The third generation iPod nano, released September 2007, is a radical departure from the first two nano generations. Its short and wide anodized aluminum case came in lighter color shades and allowed for a large 2" display. Two versions were offered, in 4 and 8 GB capacities, and they remain as the heaviest nano generation yet produced.
Use the iPod identification system to help you identify your iPod. They tend to look very similar, and it's important to know which one you have before ordering any replacement parts.