So have you tried hooking up a vga screen to your converter? Maybe it's the VGA to S-Video that's not accepting the resolution that the converter outputs.
This device converts the HDMI digital video and audio signal into an analog signal for use with VGA monitors or TVs with a VGA input and an insufficient number of HDMI inputs. The audio is also converted to analog audio, with the output sent to a pair of RCA jacks. Only LPCM 2-channel audio is supported.
The converter will handle input signals up to 1080p and will output the same resolution. However, it will not upscale or downscale the signal, so the monitor must also be capable of handling the same resolution, so the input signal should be set to match the monitor's capabilities. (If the monitor cannot handle the resolution, the display will remain blank.)