Got it! It was the CF card from the CPU board! On the preavious steps we changed the entire CPU board from the working robot but we kept the original CF card. Now we just changed the card and it was booting without problem.
The next step is to load the backup an see if will start in auto mode(conected to the line).
There is any other steps to be taken before load the backup? Or is only overwritting?
thx.