Hi Sergio,
thanks for your reply.
Indeed, we are following the guide you linked. The version on the webpage does not explicitly mention it, but the "short the resistor" part does NOT apply to Galileo Gen2 boards (which we are working with). It is a part of the Galileo Board User Guide (available as PDF ) which clearly targets Galileo Gen1.
Apart from that, we have a working board that boots and use it to test and verify our serial connection as well as our assumption that instead of the resistor, the FWR golden square needs to be connected with GND to force recovery mode. My coworker recovered a third board using this method, so I am sure it works and the guide that you linked to is outdated. I could not find an updated guide however...
As already stated, we are trying to get this board to work again using a DediProg SF100, flashing it as described in Section 11 of the BSP Build and Software User Guide. Regardless, we do not get any response except the LEDs.
Regards,
Sylexx