GO 5000 maps not found, now device not found

Driving_Change Registered Users Posts: 1
New Seeker
Updated maps yesterday which failed and corrupted file. trying to do a reset on device but will not bring up interface to get to reset menu, just tells me maps missing. tried connecting to mac and Mydrive app. Doesn't find device any more so have found so far no way am able to factory reset device. Have removed Micro SD card. Unfortunately all the videos just tell you to hold power button to reset not factory restore. Any help appreciated.