Hi Jim and thanks for your fast answer, i have the original main board damaged by another problem but it receives well and has the mars mod, I know of an executable file under the old DOS operating system that seems to update the band table in the eprom but I have my doubts about using it. Do you know if the 920 stores this data in one of the 2 external eproms or in the cpu itself (MB90P263), perhaps I could copy its data and rewrite it in this one. Thanks again Jim.