Thread: Garmin - BMW Motorrad Navigator IV - No PC connection

Have you tried a hard reset? Sometimes that will work to fix strange behaviors. [Only registered and activated users can see links. ]

I think the Navigator IV is basically a zumo 660 with a different HWID and in a custom mount but I haven't checked to be sure of that.

Despite no physical damage of the USB socket connections to the PCB, some devices can be still operable in other ways but lack Mass Storage Mode access so are 'partly bricked' nonetheless. In such a case you can try to access a preboot mode by holding the battery symbol for about 5-6 seconds to show the hidden menu page and then connect to PC. If that works it will be visible in Windows Device Manager under 'GARMIN Devices' as 'Garmin USB GPS' and then it'll keep that preboot state indefinitely to allow re-flash of standard firmware or flash cure firmware via Updater.exe.

If that doesn't work, it may use the same method of accessing preboot for zumo 660:

1. Turn off the navigator (Some bricked units won't turn off normally so if necessary just force it off by holding the power button for between 10 and 30 seconds as required).
2. Press the LOWER left corner of the screen (Most devices are TOP left, zumo 660 and some others are lower left).
3. Turn on the navigator by pressing the power button still holding the lower left corner of the screen. You can also try by holding screen and connecting to the PC which should both power it on and attain preboot mode).

The device will only stay in preboot for a short time by this method. The best procedure is to have an RGN file already opened in Updater.exe ready to flash immediately the device details appear in Updater.exe's GUI.

Navigator IV looks like a zumo 660 but it not react like zumo to pre-boot mode. Navigator IV have the mini-usb under the battery cover and the cover have an magnet inside. With the cover removed the device after start have the "close battery door" message on screen. When connect the usb cable the device start but PC did't recognize the connected device.
I try all possibilities to put in pre-boot mode but I have no results. Only react of PC with very short time is when the cable is connected and I push the power button for more then 5 seconds.
I think the only way to recover the device is to find the exact procedure to put in pre-boot. Also I don't know where to find the RGN file for this model.

Anyway, many thanks for all advices.