Sorry for the delay.
Do you have any jumper cables? It would be good to do a loopback test on the serial port, connect TX to RX. Open it with minicom, everything you type should be echoed back. Some more info here;
Can you also take a photo of the top half of the BerryGPS-IMU and upload it here. In the past, we have had components been knocked off
Mark --OzzMaker.com --