Thread: Kenwood dnx 7220 Pre-Boot and Firmware Flash

I have a DNX4330DAB have done an update to latest version software
Problem is Garmin does not work
Screen shows small test image not seen down each side of screen
Gleaned info that there is error with base map
How do I fix this does the above steps work for my model
Another question how do you get a copy of these files to repair the corrupt files
The garmin part has not worked since I put it in the car YES IS A SECOND HAND purchase was told all working now tring to FIX it
Like other post said no button till I get inside no idea what I find
Is it the fact that a PC goes beep and shows the tree structure is the fix seems strange

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After reading some posts seems I need to get into this internal USB
So hoping doing the get to internal usb some how get it to talk to a pc check out the files
Wonder if it can be removed from unit and connected to a pc or does it need its own power from the stereo