Hello Harry,
Does your G98 give an error code in its display?
At first I agree with Carl about updating the firmware.
I had lots of problems with an HDCP error. At the end it wasn't caused by my G98 but by a Gefen switcher. That was replaced and things work fine now.
Gr. Paul.

G68ADV, G98DH, 7000, 5200, 5200HC, JVC LCD, Samsung HD cable-receiver, Gefen 4x2 HDMI switcher, MIT cables and Logitech Harmony 1000.