OK when you say took the chip out you mean the 2 SD cards.
Below is the pages from the manual that refers to the what you call chips and all other functions.
Why you or your teenager took out the 2 SD Cards and formatted them is not very clear.
Nr.13 is the USB interface
Nr.14 is to reset the radio back to default.
Nr.15 is the SD card for music
NR.16 is the SD card for GPS
From what I read from the manual you can download the GPS software.
If I were you I would go over the manual a couple of times to help you correct what you need to do.
Bookmarks