Knasen,
I tried s1clone at the begining. Even I can generate a file of 25Mb or so with the working MP4, I got an error (flash memory not found) when tried to upload to the dead MP4.
Thatīs why I discarded this method.
With other upgrade utulities something is left at the memory of the dead device, as further upgrades detects the previous version. But doesnīt work anyway..
bygben: thank you, anyway.
I donīt know what else to do...
Regards,
Sergio