Hi to all, where to start...

My Navigator VI was working fine until one day while connected to Garmin Express it decided to shut down when on battery and cycle reboots when on power source.
I have tried a good working battery from another unit to eliminate that as a reason, same result.

When I load cure firmware it works ofcourse and I can access file system etc., tried dozens of time formatting, rmprepping with different BL options, flashing original / cure / original, just about everything I could try and no go.

At one instance I got it to boot without crashing (that time it was rmprepped as Win bootable fat32, trial & error method), got into MTP settings via volume icon, mass storage mode so it gets recognized by pc then rmprep as ms-dos bootable fdd to get it recognized by Garmin express and it all seemed to work, until I copied over map files I had from a previous backup, then it started rebooting again so that seems as a reason. Back to beginning but I thought at least I know what to do this time, wrong...

The problem is that was some 2 weeks ago and since then I try more or less every day cure, format, rmprep, flash original and no success so I'm giving up slowly but surely.


So, in every case/setup it shuts down on its own power, difference is if it is prepped with FDD bootloader option thicked then it shuts down almost immediately on choose locale/language screen but when cure firm is on it it gets recognized as Motorrad Navigator VI, even Garmin express offers to update (done but without any difference ofcourse) and when original firmware is on it keeps rebooting. If it is prepped without FDD option then it gives me some 10 seconds of operating before shutting down and it's recognized by pc only as usb device without showing in file explorer or express. That is the only thing I managed to figure...

Any ideas? Am I missing something? At first I thought flash memory has gone bad and that is it but since it did work normal for a day until map was copied over I don't think it's a hardware issue after all.