This Instructable is on how to open a Garmin nuvi GPS. We used a 650, but it is very similar for any series 3xx or 6xx. This should be helpful to anyone that wants to do anything inside a Garmin nuvi GPS device, such as fixing a broken power button.
Do not forget to remove your SD card if you have one.
Keep yourself grounded.
- Torx T-5 screwdriver OR a small flat head screwdriver(what we used, because we don't have a Torx).
I am not liable for any damages you cause to your device, this is only a guide. You should have at least moderate technical skills to attempt this.
Step 1: The antenna.
The first step to successfully opening your Garmin nuvi GPS is removing the antenna, because there are screws under it that hold the case together.
First, you should unscrew the two screws at the top of the antenna. Then, turn the back plate of the antenna CLOCKWISE, very very carefully. You do not want to rip any of the wires because they are quite thin. Once you have the back plate turned, find the holes in the bottom area of the antenna. Put your screwdriver in the left-most hole and once you find the notch, pull right and carefully tilt the antenna. Remove the black pivot and spring. Gently pull out the entire antenna from the main case. Once it its slightly pulled out, both of the antenna plates should fall off the GPS antenna itself.
Use the pictures, they will help a lot.