To resolve this probleme u will:
1- format flashdisk in fat32.
2- download the file in the link unzipp-it and rename the file .bin into GxRom.bin
https://www.sendspace.com/file/udtymr
3- copy the file GxRom.bin in the flash disk.
4- put the flash in the receiver and plug the receiver in sector.
5- in the same time we will premut the power botton in the remote and don't release it only when we see upgrading in the frontal panbel.
When complete the receiver is ok