Thanks for the helpful post, but there was no need
We are not small children and everyone takes on their own possible options to get into a screwed nuvi.
I have bought a lot of 2nd hand devices and just such a problem has never happened to me ... that's why I'm asking IF it can be fixed somehow.
If it can't ... I have the option to return it to the sender .. after all, eBay has some kind of protection
So everything is well thought out and thought out .. there was no need for such an instructive post ... everyone has a head on their own shoulders and can think with it

My wonder is, since it works perfectly and can do distances... what exactly happened to not connect to the USB (in this case, it DOES charge when I connect it through the PC, it just does not enter update mode)
This means that his USB port still works...

p.p. Thank you once again for the meaningful post...thank you!