@doko
You said in initial post that it was stuck on logo but now you say its displaying system software missing message. Did that change occur after you flashed Cure firmware? Maybe it's had an inappropriate firmware flashed to it. Open [Only registered and activated users can see links. ] and then put the unit in preboot to check it's HWID as per the directions in that thread. If you have an old backup, look at the GarminDevice.xml to see what HWID shows there too, if it's changed that's the problem. Let us know what you find. More info here: [Only registered and activated users can see links. ].