Then I hit o - boot device option in order to boot it through an ethernet port and then hit x in order to boot.
Then it just stays there and throws a character and never responds again
where could I get the firmware in order to upgrade via hyperterminal / serial port and see if this helps
This sounds a lot like the problem I mentioned here
. In my case, the RB1200
would either lock up before the boot
loader printed anything to the display (about 1/3 of the time), or everything would work fine. Using the reset button to force the default boot
-loader didn't help (it too would lock up 1/3 of the time before printing anything), and it didn't seem to matter how long the board had been powered on or off prior, or whether it was power-cycled or given a reboot command. Multiple upgrades/downgrades of ROS and boot
loader did not help.