Thanks – could you please give me the details of the other PC that you used? Was it still the same OS, or was it a Windows machine?
A couple other things that would be helpful:
– You said that the resolution LEDs on the PiCapture were indicating a 1080p signal. Are you able to properly capture video with the board?
– Could you try connecting the PiCapture to the HDMI output of a Raspberry Pi and see if that works OK?
The EDID information is loaded at powerup (effectively “reprogrammed” every time the PiCapture starts). Since it is responding properly to PiVideo it is highly unlikely that there is any firmware issue.