Quote Originally Posted by MichelDumont View Post
I have made some progress: I have been able to load the update in the unit but there is no change in the behavior of the unit, still just showing splash screen. It showed "software loading" while update.exe was working and it said "the update was successful" at the end but the gps still won't connect to windows or to Garmin Express on a different computer. One thing I noticed is that when the update executes, the first progress bar that appears shows the procedure t be completed, it then starts again showing a progress that takes maybe 30 seconds to complete after which it says "The update was successful". Am I looking at a hardware issue with that gps or is there something else I can try? The software (5.90) is the correct one as this is what Garmin Express has in memory when I did the last successful update on it.

Thanks again for your help.

I was able to upload the software to the unit and there is some improvement but still won't connect to windows unless put in preboot mode where I can reflash it. If I choose "cure" when updating the unit with Garmincure3, it ends up cycling to computer connection to black screen to computer connected again. I can see the drive on windows but not the files. The drive is 4.47 GB of data with 2.54 Gb free. The preogress bar when updating through updater.exe restarts a few times and takes approx 30 seconds to complete, seems short... I have confirm that the software I am attempting to load is the right one (5.90). Many thanks for your help.

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@MichelDumont
That post you made quoted above wasn't visible to me when i answered last.

I suspect there's a software update file on the device which tries to update it over and over causing the problem. Probably it's the main firmware file, gupdate.gcd in hidden .System folder, but it could be another minor update file.

I'm having a little difficulty following your steps, maybe you're doing it right but i suspect you don't fully understand the process and implications. To be clear, what you should be doing here is loading Cure fw in preboot via Updater.exe to re-enable Mass Storage Mode so you can remove any likely corrupt file from the device (maybe gupdate.gcd in this case), and finally re-loading original firmware with Updater. If the culprit file was removed the device will then boot fully and operate normally. If it still plays up after removing the GCD file from .System, repeat the cure process but this time take a full backup of the file system, reformat it with RMPrepUSB only, load original fw and then connect to GarminExpress to replace what you can. Read the first post of Kunix's Cure3 thread again carefully and ask if you still don't understand everything before proceeding.