Thread: Kenwood DNX4230DAB missing SD card

Thanks Butters for the reply, I have followed those instructions, and seem to have made some progress, I have a map gmapsupp.img, that shows an unlocked map.
I have written them to a blank fat32 SD card, in the Garmin folder.
When I put the card in and hit the 'nav' icon, the head unit switches to nav, displays 'loading maps' and then goes to 'ready to navigate', no map is shown, no are there any on screen icons or text!.
I can hit the left had lower screen, no text or icon is shown, but it pops up a menu where I can enter an address to navigate to.
Entering an address via the postcode works, it finds the street address, but when I view route, there is no map shown.
I am wondering if there is something else missing from the card, as I have no map displayed, and no icons on the nav screen.

Looking in the 4230DAB manual, I should see icons on the nav screen, but I see none at all, but I can see the onscreen keyboard, I can see the trip menu when I tap the distance numbers on the screen, but no icons or menu.

Just in case, I repeated the firmware update to the latest version, but that made no difference, it said update successful and to reboot which I did, but it's still the same.

Ok, further update (maybe).
I have found out how to put the head unit into test mode, it passes all tests, which is good.
But, in navigation, it says 'Base map' 0000 Missing and 'Detail map' 0000 Missing, but the navigation software is showing as version 0350 KNWD 2013 SW Only WinCE and the Junction View is showing as 0200 Junction View.

So it looks like the unit isn't seeing the maps on the SD card, If I take out the SD card, I get 'no map data available' on the screen, re-insering the SD card, I get 'loading maps' then no map data available.

I am unsure if the maps are displayed from the SD card, or copied from the SD card to the internal memory, then displayed from there,