I have done the step suggested by nano in the tutorial using the files contained in the attachment: duomulti nbox.rar.
The upload complete ok but when I restart the box I have always U-Boot 1.3.1 0.53 and the same menu :
UsbA
Usbb
Hdd1
Hdd2
Hdd3
Nand
PKTN
NFS
The voice b4 u doesn't appear after NFS.
Is it possible that the box is locked and the boot-loader cannot be changed?? Or the file is not correct and the box doesn't accept it?
The model is ITI-5800SX SN:BSLA....