It's probably a local computer problem that is beyond our knowledge.
But, first try a CLEAR SETUP on the H8000. Also different cables. Look to see if the BUSY light by the card flashes when you try and talk to it – this will show it is receiving.
There may be issues with Windows 8 – not many people use it so it is hard to know. You should probably try it with another computer to try and isolate the problem.
