Hi AngeloZip
Hard to be calm when you are in this kind of a situation!
Was a mix up on ebay and I purchased the 3790 by mistake, wanted the 3490! Rather than sending it back, I decided to simply load in the 3490 software. I had been here reading about the 3490 and 3790 prior to my purchase.
I thought this was going to be easy to do, never expected all the difficulty that I am having, getting to 3490 level!

Well, I tried what you said, and it indeed work and the message at the top said loading software, with the Garmin Logo and blue triangle in the middle of the screen. After about 20 minutes, I plugged it into the computer USB port. It immediately sent up an error message, something about not the right version of something and it shut down.

Now, a completely new situation, no matter what I try all I get is the Garmin Logo in the middle of the screen. Have tried to get back to pre-boot condition, but after about 20 tries it does not seem to want to work. And between each try, I held the off button for about 15 seconds, just to make sure it was going off.

What do I need to try next?

George