Help for a Magellan Triton 500 blocked (reinstall the ROM ?)

Hello !
First, sorry for my english: I'm french and I use mostly Google traductor.

I have a trecking GPS Magellan Triton 500. I hope it's the same type name in english..
It was working well but one day it couldn't go further than the splash screen. With the type name and the full loading bar.

I found a topic on a french forum giving a lot of instructions to "reinstall the ROM". I have to dowload the file T500_rom.zip. But I don't find it..

If someone think he can help me, I'm desperate. I'm in training in a natural park and I use this GPS everyday in my work.

THANK YOU !

 

what happened to the splash screen?

 

First, thank you.
To be sure we are talking about the same thing (because of the language): I turn on the GPS normally, with only the start button on the side. Then, something appears and it's the classic splash screen showing the name "Magellan" and a loading bar that fills. The loading bar fills completly and after: nothing. I have to remove batteries to turn off the device.

 

take out both the battries and restart again